What connection can be drawn between U.S. involvement in the Vietnam and Korean Wars?

A.
Both were efforts by the United States to acquire territory in the Pacific region.

B.
In both instances, the United States acted in violation of major international peace agreements.

C.
In both instances, the United Nations condemned the involvement of the United States.

D.
Both wars sparked worry about the spread of communism which were a part of a larger conflict between the United States and the Soviet Union.