What did the Indian Appropriations Act of 1851 do?
Kept federal officers from signing treaties
with American Indians
Moved tribes to reservations with defined
borders
Gave American Indians more land
DONE

The correct answer is the third one: Moved tribes to reservations with defined borders.

The U.S. Congress passed the Indian Appropriations Act, creating the reservation system. The government forces Native peoples to move to and live on reservations, where it can better subdue them

Why do you have to ask such hard questions.