The correct answer is C.
He attempted to establish peace treaties with Native Americans.
President Grant’s approach to interacting with Native Americans was different from his predecessors when he took office in 1869 through the establishment of peace treaties with Native Americans. President Grant adopted a 'peace policy' to eliminate Indian agents who supervised reservations as they were corrupt and replace them with Christian missionaries whom he felt were morally superior. The policy was based on the belief that Americans had a right to dispossess native people of their land by taking away their land and disposing them to reserves. At the reservations Christian missionaries were expected to teach them how to read & write, to farm, Christianity, and wear Euro-American clothing. The native people who refused to move to reservations were forced off their homelands.