Which factors led to the development of the four river valley civilizations of mesopotamia, egypt, the indus valley and china? choose all that applya. the ability to communicate widely through writingb. a nearby riverc. people doing different jobsd. the building of villages and citiese. the construction of places of worship

D. The building of villages and cities.

B. A nearby river

C. People doing different jobs.

Explanation:

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small european communities with shared traditions consolidated into large new states (apex)

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.