The answer would be:
C. The Republican platform in 1845 was anti-slavery and the Democratic platform was pro-slavery.
The League of Nations was formed to unify many countries. It wasn't very efficient. The United Nations was essentially an improved version of the League of Nations.
Two things that were severely hurting the Soviet economy just prior to its fall were "A. The agricultural and manufacturing sectors were not meeting peoples' needs", since this was a "command economy" in which the government was in control of output.