Name two advances that helped Sumerian civilization expand.

Two advances that are important for Sumerian civilizations are development of written letter and development of irrigational system.

Explanation:

Sumerian civilization is one of the world's first civilization where first countries and political organization emerged. Created in the valley of Tigris and Euphrates, this civilization developed irrigational system that enabled people to create more permanent settlement in that area and to develop agriculture. On the other side, the development of written letter enabled the creation of certain institutions that enabled easier functioning of the city-states that were created there.

the answer is c sharecroppers were trapped in a cycle of poverty and debt.

explanation:

one of the major disadvantages of sharecropping system is that the sharecroppers or the planters are stucked in an unhealthy cycle of debts. this happens because planters will be allowed to loan merchandise from the land-owner and will soon be paid by the farmer in his share in the farm come harvest time. hope this !

by kd

d. hip hop

it was originated in the 70s while the harlem renaissance occured in the 1920s