Question

What was the main reason for U.S. involvement in Vietnam?

1. a response to a request for support in the fight against communism.

2. the decision to honor a treaty agreement.

3. the belief that communism would spread in Southeast Asia.

4. an interest in honoring a commitment to the members of the United Nation.

Answer 1

3. i know this is correct because i got it right

Answer 2

Step-by-step explanation:

3. America believed in the Domino effect where if one country falls to communism, the neighbouring countries are also at threat of communist revolts.