How did U. S. policy toward American Indians shift over time? A. From a policy of integration to a policy of separation
B. From a policy of war to a policy of alliances
O C. From a policy of enemy nations to a policy of friendly nations
O D. From a policy of removal to a policy of assimilation
Most likely (D)

Between 1850 and 1900, life for Native Americans changed drastically. Through U.S. government policies, American Indians were forced from their homes as their native lands were parceled out. The Plains, which they had previously roamed alone, were now filled with white settlers. You are right most likely D

Explanation:

d. it adversely affected american productivity

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )