“With a culture that stretched from western India to Afghanistan and a population numbering over 5 million, the ancient Indus Valley people—India’s oldest known civilization—were an impressive sanitary bunch. A 1922 excavation revealed an advanced culture with sophisticated sewage drainage systems and fancy bathrooms. Yet, there is no archaeological evidence of armies, slaves, social conflicts, or other vices prevalent in ancient societies. The scale of their baffling and abrupt collapse rival that of the great Mayan decline.”

According to the passage, what is the oldest known civilization of India?

Indus Valley people

Explanation

Aztec people are not mentioned in this passage. Mayan people are mentioned but only in comparison to the mystery surrounding why this culture disappeared. Part of the Indus Valley people included Afghanistan but reached beyond into India.

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