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Which is considered a major contribution of Mesopotamian civilization? A. They discovered how to cultivate cotton. B. They invented a complex system of writing still used today. C. They were the first people to make and use the wheel. D. They were the first people to accept a belief in one God.

Sagot :

A major contribution of Mesopotamian civilization is B. they invented a complex system of writing still used today.
They invented a complex system of writing still used today.So it's B.