Which action caused the greatest change for Native Americans during the 1960s and '70s? A. President Johnson ordered that all Native American reservations be disbanded.

B. The U. S. government appointed Ben Nighthorse Campbell to head the Bureau of Indian Affairs.

C. Martin Luther King, Jr. staged rallies on reservations to gain publicity for their cause.

D. American courts decided in their favor in treaty disputes, giving them land and monetary reparations.