Answer:
C. Groups began to settle in one place
Explanation:
Before the development of agriculture, people would hunt game. They would hunt animals and gather. If there would be no more animals left in the area, they wouldn't be able to survive, so they wouldn't be able to stay in one place.
With the development of agriculture, they were able to make permanent settlements, and wouldn't have to move so much.
Therefore, C would be the correct answer.
