Question

Which statement below is NOT true of Mesopotamian, Harappan, and Egyptian cultures c. 2500–2000 B.C.E.?

Answer 1

The correct answer is B. Each had developed written languages that have been deciphered by modern linguist.
This is the statement that is false, because the Harappan writings are still not deciphered by the modern linguist. There's even a theory that it might not even be an actual writing system.