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.

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.

i think the answer is b.

answer: capitalism and socialism are formal economies. the major differences between capitalism and socialism revolve around the role of the government and equality of economics. capitalism affords economic freedom, consumer choice, and economic growth.

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explanation: