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OpenStudy (anonymous):

How did the development of irrigation systems improve living conditions? A. It gave people a surplus of food. B. It made people switch from hunting to herding. C. It made people less dependent on trade. D. It allowed people to move out of town onto farms.

OpenStudy (anonymous):

It is A

OpenStudy (anonymous):

ok iw il tyepe in th echat the rest ok?

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