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OpenStudy (anonymous):

Which factors led to the development of the four river-valley civilizations of Mesopotamia, Egypt, the Indus Valley, and China? Choose all answers that are correct. the worship of many nature gods the presence of rivers a surplus of food the building of villages and cities the need to unite for protection from enemies

OpenStudy (paki):

what you guess about the asnwer here...?

OpenStudy (anonymous):

I don't really know one

OpenStudy (paki):

i am pretty sure about A,B and D...

OpenStudy (anonymous):

thank you so much

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