Which was part of Sumerian farming and trading? Select all correct answers. A: Levees held back the annual floods of the Tigris and Euphrates Rivers.

B: Lumber, stone, and gold produced in Sumer could be traded for food.

C: Surplus barley and wheat could be traded for other things

C and B

Explanation: I took a test with this question.

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imma have to go   the third option

sorry if i am wrong hope this

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to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.