Which of the Following Is an Example of the Shift

Which of the following is an example of the shift away from the city-state's domination of economic activity in Mesopotamia?

A) New rulers designated private entrepreneurs to collect taxes and allowed them to keep a portion of tax revenues for their profits.
B) New rulers forced individuals to donate large amounts of labor to support the maintenance of the city's defensive walls.
C) New rulers allowed farmers to purchase land from the state in order to obtain economic independence.
D) New rulers allowed their generals to control all long-distance trade.