Which was part of Sumerian farming and trading? Select ALL correct answers.

A. Lumber, stone, and gold produced in Sumer could be traded for food.
B. Levees held back the annual floods of the Tigris and Euphrates Rivers.
C. Surplus barley and wheat could be traded for other things.

Based on this poster, what conclusion can be made about the u. s. government during world war i? it wanted to boycott trade with enemy nations. it wanted to provide low-cost loans to its allies. it was not able to fully finance the war effort through taxes. it believed the majority of its citizens did not support the war.