Question

What was the purpose of the Bureau of Indian Affairs?

to manage reservations

to provide trails for trappers

to negotiate with homesteaders

to assimilate native peoples

Answer 1

i think to manage reservations

Answer 2

AGREED

The purpose was to manage reservations (don't say peoples)
BIA, by the way is the agency of the federal government of the US (you can read more about that on http://en.wikipedia.org/wiki/Bureau_of_Indian_Affairs)