American Indians being forced onto reservations is the phrase best completes the list. Hence, option D is correct.
What was happening to the Native Americans during the mid 1800s?
The lands were sold to the non-native American as surplus lands. The act broke the collective land ownership custom of the tribe.
Many Native Americans had their allotments stolen from them or were made to sell them. In the end, Native Americans lost millions of acres of their ancestral territories in the West.
Thus, option D is correct.
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