Which of the Following Is Likely to Have Played a Part

Multiple Choice

Which of the following is likely to have played a part in the origins of agriculture?

A) Climatic change; foragers could not become agriculturalists until the environment was capable of supporting agriculture.
B) Population pressure; people were required to expand their diets and rely more heavily on plants.
C) Human intentionality; changes in wild cereals suggest that humans intended to increase harvest productivity and efficiency.
D) All of the answers are correct.