I believe the answer would be A. Levees held back and annual floods of the Tigris and Euphrates Rivers. And B. Surplus barley and wheat could be traded for other things.
C) Poor working conditions
It's the only option that would would be considered a negative outcome.
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Answer:
C. He spoke English and could serve as a translator between the two sides.
Explanation:
Effective communication was key to Squanto's success as an intermediary