Which of the following was an effect of farming on the development of early
river valley civilizations?
A. Farming produced little food, so people developed governments to
determine how to distribute crops.
B. Surplus food allowed groups of people to specialize and stratify,
which led to laws and governments.
C. As farming proved to be too difficult, many people needed to hunt
animals and gather wild plants.
D. Because farming produced extra food, people were able to form
less permanent settlements.
