Question

in the 1870s, the us government began an american indian policy of providing allotments of land. encouraging assimilation. confining tribes on reservations. forcing tribes to relocate.

Explanation:

In the 1870s, the US government's American Indian policy focused on encouraging assimilation. The Dawes Act (1887, but policy trends started earlier) and related efforts aimed to assimilate Native Americans into white American culture by breaking up tribal lands (allotments were part of assimilation efforts, but the policy goal was assimilation). Confining to reservations was more of earlier periods, and forced relocation like the Trail of Tears was earlier (1830s). So the correct option is the one about encouraging assimilation.

Answer:

B. encouraging assimilation.