These statements are describing the effects of the supreme court's decision in:

a. triggered the "panic of 1857" and resulted in several railroad bankruptcies and bank closures.
b. strengthened pro-slavery and secessionist support in the south.
c. made the question of extending slavery into new territories an unstable issue.
d. divided the democratic party on sectional lines and strengthened the republican party.

d is the best answer for this question.

hernan cortes;

explanation:

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.