B. People moved from rural to urban areas
Mesopotamia has two regions; the Sumer (south) and the Akkad (north). Sumer, the south region is the first known complex civilization, developing the first city-states in the 4th millennium BCE. It was in these cities that the cuneiform script appeared as the earliest known form of writing, in which invented by Sumerians.
Answer:
GDP declines, and unemployment rates rise because companies lay off workers to reduce costs. At the microeconomic level, firms experience declining margins during a recession. When revenue, whether from sales or investment, declines, firms look to cut their least-efficient activities.