Why did the Plain Indian have "little choice but to move to reservations"?

the promised food often failed to arrive. Sometimes dishonest whites, working as federal agents, sold it to settlers instead. Often the food was spoiled by the time it reached the Indians. so Despite Sitting Bull’s words, the buffalo were disappearing which  Plain Indian have "little choice but to move to reservations"?

Explanation:

answer is :

many churches split during the movement.

new religions grew in popularity.

i dont no the claim so it's hard to answer but i think he would go to the people to decide. : ) ; )