Which of the following best explains the United States involvement in the Korean War? To reunite two regions within Korea
To reunite two regions within Korea

To prevent the spread of communism to South Korea
To prevent the spread of communism to South Korea

To keep China from occupying Korea
To keep China from occupying Korea

To protect American military bases in North Korea

A United States policy using numerous strategies to prevent the spread of communism abroad. A component of the Cold War, this policy was a response to a series of moves by the Soviet Union to enlarge communist influence in Eastern Europe, China, Korea, and Vietnam.

Primarily because of the threat of Communist expansion by China, along with fear that the SU was working with China to create bombs. Plus, Korea was positioned at the 38th Parallel, which makes it an important point to hold in the area for political control.

North and South Korea had been a single country known as Korea. ... By invading South Korea, North Korea hoped to reunite the two nations as a single country under communism. With North Korea's invasion of South Korea, the United States feared the spread of communism.

the answer is a) high entry costs