Which statement does not explain continued hostilities between the US government and American Indians living on reservations?

a. Harsh conditions on most reservations made hunting and farming for subsistence impossible, leading to conflicts over access to resources.
b. The Bureau of Indian Affairs’ mismanagement of reservation land resulted in shifting reservation borders and the loss of land promised to American Indians.
c. Militaristic persecution of American Indians by cultural and religious interest groups forced American Indians to assimilate into white culture.
d. White settlers used pressure and fraud to acquire American Indians’ land without just compensation.