As more settlers of European descent settled in the plains, how did this change the way of life of the American Indians who lived in the region?

A) As the settlers took more land for cultivation, more American Indians willingly chose to become farmers.

B) The American Indian way of life in the plains changed due to the settlers’ destruction of the buffalo population.

C) As the railroads developed in the west, settlers began to move into the plains to trade with the American Indians.

D) The American Indians joined the settlers in building cities around the railroad stations.