A & C are SOME of the possible answers.
Answer:
i think the answer is (B)
Explanation:
William Henry Harrison led a force against Prophetstown.
The main reason was joining the Axis Powers, which earned them territory.
One of the most important was climate changes. As climate changed, nomads had to find new places to migrate to which led to people going to areas that were uninhabited before. Another was the development of agriculture which more or less ended the nomadic way of life when people started settling.