What was NOT a major policy that the US government used concerning Native Americans during the late 19th century?

U.S.-Native American Policies in the last half of the 19th century usually get watered down to only the Plains Indian Wars, Custer’s Last Stand, and Geronimo. History textbooks and classes highlight only these policies because they show the United States’ great strength and will-power.

Explanation:

number 1 is a)

c. businesses/firms & government