Which of the following best summarizes the impact that farming had on the development of early river valley civilizations?

There is no options but I believe these are it.

A.Farming produced a surplus of food, which allowed people to form less permanent settlements.
B.Fewer farms were needed to produce enough food, so many people had no work to do.
C.Fewer people were needed to support each farm, so the population near farms decreased.
D.Farms could support larger groups of people, which led to increased population growth.

the answer would be D