Which of the following did the Republican Party support when it formed in the 1850s? popular sovereignty
free labor
lower taxes
reduced regulation

As gabelikeskicks said, B) Free labor is the correct answer.

I also took the test so i can say this is the right answer :)

cherokee and arikara

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.