He called it the Iron curtain because Russia separated from Europe. Hope this helps!
1 is inflation
2 is tarrifs
3 is shays rebelion
4 is depression
5 is daneil shays
6 is interstate commerce
The answer is D
Reason being that the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to getting involved.
A is incorrect because Lincoln ran for the republican party.
D is incorrect because the Democratic party was pro-slavery.
So that leaves us with B and C.
I don't know who John C. Breckinridge is, but I do know that Lincoln was the least popular candidate running for president. The only reason Lincoln won the election was because the democratic party split their votes between two candidates, so neither democratic candidate got enough votes to win the election.
So the answer is B.
