The United States went to war in the Korean War to prevent communism from spreading to South Korea. Therefore, option B.) is correct.
When the North Korean Communist army passed the 38th parallel and attacked non-Communist South Korea, the Korean War (1950-1953) began.
The United States went to war in the Korean War to prevent communism from spreading to South Korea.
Thus, the reason they took the battle was to avoid the dissemination of the idea of communism.
Therefore, option B) is correct.
Find out more information about Korean war' here:
brainly.com/question/4292602