The business executive’s presentation was incoherent. His slurred words and mumbling made his speech very difficult to understand.

In this context, the word incoherent means

Superman originated as a character in a comic book in the 1930s. Then a radio program called The Adventures of Superman was created. Later, Superman became part of going to the movies. Short episodes were shown each week in theaters in addition to a feature film. When television became part of American life, it, too, had a weekly program about Superman. In the 1980s several full-length films about Superman appeared.

From this passage, you can conclude

The most effective way to reduce gun violence without significantly curtailing Second Amendment rights is to treat the problem as a public health issue, like smoking or drunken driving, rather trying to profile potential shooters, according to a report released Thursday by a panel of experts who were commissioned by the American Psychological Association to study the issue in the wake of the Newtown, Connecticut, massacre.

The author would agree that the best way to reduce gun violence is:

In the winter of 1999, many central and northeastern states received less snow in winter than the average. Scientists have proposed several reasons for the situation. One possible factor is global warming; however, scientists still know very little about this phenomenon. Another credible reason for less snowfall is La Niña, which causes unusually cold ocean temperatures in the Equatorial Pacific. The result of a strong La Niña is greatly increased snowfall in the northwest and less snowfall in the central and northeastern United States. Thus, it may appear that there is less snow in a given year.

It may be inferred from the selection that

The expert predicted that America's gross domestic product will return to more than 3 percent yearly expansion. For example, Dow Chemical is investing $4 billion in Texas plastics production that will be operational by 2017. Such growth requires cheap oil and natural gas - and "by 2020 or so, the United States will surpass Saudi Arabia in oil output, and Russia in gas." He continued:

"The big attraction is the low price of natural gas, the lowest-carbon fossil fuel, which can be produced profitably at about a third the price per unit of energy as other hydrocarbons. That is particularly attractive to chemical companies. It is the raw material for plastics, Styrofoam, tires, sealants, adhesives, films, liquid crystal screens, nylons, polyesters - nearly everything around us."

In this passage, what's going to cause America's future growth?

In New York State, where Gov. Andrew M. Cuomo signed one of the toughest gun law packages in the nation last January, two sheriffs have said publicly they would not enforce the laws—inaction that Mr. Cuomo said would set “a dangerous and frightening precedent.” The sheriffs’ refusal is unlikely to have much effect on the state: According to the state’s Division of Criminal Justice Services, since 2010 sheriffs have filed less than 2 percent of the two most common felony gun charges. The vast majority of charges are filed by the state or local police.

Based on this passage, you can conclude that:

Many plants that appear pretty are actually invasive and harmful to the environment in which they grow. Such plants establish themselves in new areas and eventually displace plants that grow naturally in the region. Eventually, many plant species become displaced and then endangered.

The best title for this selection is

Six years ago, lawyer-banker-scholar Charles Morris wrote a prophetic book - 'Two-Trillion-Dollar Meltdown: Easy Money, High-Rollers and the Great Credit Crunch' - that foresaw the 2008 Great Recession before it clobbered America and the world.

Now Morris has reversed course and sees good times ahead. His forthcoming book, 'Comeback,' predicts that surging U.S. energy independence will bring a buoyant rise in American manufacturing and jobs.

The implication of this passage is that you should pay attention to Charles Morris because:

Recent sociological studies report that violence among adolescents is linked to television watching. Researchers found that teens who watch more than 1 hour of television per day are at increased risk for being involved in assaults, fights, and other violent criminal behaviors later in life.

The author probably believes that

Weight loss experts recommend lowered calorie intake and regular exercise to get rid of excess weight. However, lowering calories too much or exercising too strenuously can be detrimental to good health. Caloric intake should never go lower than 1,200 calories per day, and exercise should consist of at least 30 minutes four to five times per week to achieve healthy weight loss.

The best title for this selection is

Obesity has become a national epidemic. Recent studies have shown that obesity is more serious than previously thought. In fact, obesity is harder on the health than cigarette smoking. Since 27% of Americans are currently obese, and 61% are overweight, this weight problem is exacting a huge cost from the medical community.
The percentage of Americans who are currently overweight is

When you send a document to someone by electronic means, you are faxing it. The word “fax” comes from the word “facsimile.” Earlier ways of making facsimiles included photocopying and photographing. The oldest facsimiles were handwritten versions of original texts.

The word “facsimile” means

Pyromaniacs are very rarely the setters of most criminal fires. Most people who set fires do so for insurance fraud, although others often set fires for revenge and terrorism. Very few people actually start fires because they receive strong psychological gratification from the act.

A pyromaniac could best be defined as

The Pygmy tribe of the Democratic Republic of Congo (formerly Zaire), Africa, is a peaceful, nomadic group that hunts and gathers its food. Pygmies’ skin is a light yellow-brown. Adult male Pygmies are less than 5 feet tall. Pygmy tribes also live in the rain forests of India and the Philippines.

In this passage, what does the word “nomadic” most closely mean?

The Republican Party, also commonly called the GOP (for 'Grand Old Party'), is one of the two major contemporary political parties in the United States, the other being the Democratic Party. Founded by anti-slavery activists in 1854, it dominated politics nationally for most of the period from 1860 to 1932.

There have been 18 Republican presidents, the first being Abraham Lincoln, serving from 1861 to 1865, and the most recent (as of 2013) being George W. Bush, serving from 2001 to 2009.

Based on this passage, which of the following statements is not true?