Why did the U.S. take the land back that had been promised to the Native Americans in the Black Hills region of North and South Dakota?
a.
The U.S. wanted to show its power over Native Americans.
b.
The U.S. wanted to keep Native Americans farther away from settlers.
c.
Nearby settlers were being raided constantly.
d.
Gold was discovered and the U.S. wanted it.


Please select the best answer from the choices provided