I got a 100 on this paper and the answer is B and C
"The... shall choose their other Officers, and also a President pro tempore, in the absence of the Vice President, or when he shall exercise the Office of President of the United States."
A problem could've been that the Soviet Union took more than they should've. This could cause tension and lead to a war.
The racial composition of a district could not be the predominant factor when redistricting.