Which of the following rivers form international boundaries between the united states and its neighbors?
a.
the mississippi and the colorado
b.
the ohio and the missouri
c.
the rio grande and the st. lawrence
d.
the illinois and the columbia

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.