Answer:
C. March and occupation of government buildings demanding return of tribal land.
Step-by-step explanation:
The "Trail of Broken Treaties" was a series of events in the early 1970s where Native American activists marched on Washington, D.C. and occupied several government buildings, including the Bureau of Indian Affairs headquarters. The protesters demanded the return of tribal land that had been taken by the government, as well as better treatment and more self-determination for Native American communities. The events were a culmination of years of frustration and anger over the U.S. government's treatment of American Indians and the breaking of treaties that had been made with Native American nations.