The correct answer to this open question is the following.
Although you did not provide options for this question, we can comment on the following.
In 1868, President Ulysses S. Grant adopted a peaceful policy, which intended to convert Native Americans (indigenous people) to Christianity and strip them of their cultural and social traditions.
When United States President Ulysses S. Grant removed corrupt agents that supervised the Indian tribes, what he really tried to accomplish was to appoint Christian missionaries to do that activity and had a better opportunity to convince Native Indians to convert to the Christian religion and adopt the American culture, removing the Natives form their customs, traditions, and belief systems.