The national judiciary hears cases involving federal law and interstate cases. It also interprets the constitutionality of laws.
President Kennedy tried to keep communism out of Vietnam by "(C) providing the southern Vietnamese government with American <span>military advisers," since Kennedy felt that this was a way to "contain" communism without committing many US troops on the ground. </span>
The second one about it being created after the civil war
It seems like B is the most likely answer, considering it's really the only one that applies to democracy.