The rise of early river valley civilizations was caused by which aspect of the neolithic revolution? a. the rise of more warlike cultures b. the ability to move from place to place c. the formation of permanent settlements d. the equal treatment of all people

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Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.

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