Question

Which of the following best describes the “domino theory,” which was used as a justification for US involvement in Vietnam?
If the US can defeat one Communist country, it can defeat all of them.
If one section of a country is taken over, the rest of the country will also fall.
If an aggressor nation invades one country successfully, it will invade another.
If a country falls to Communism, then its neighbors are also likely to do so.

Answer 1

Answer:

If a country falls to Communism, then its neighbors are also likely to do so.

Explanation:

in other words or the short version

PS SORRY IM LATE TO ANSWERING THIS

Answer 2

The domino theory was based on the fact that if a country falls to Communism, then its neighbors are also likely to do so.

Domino theory

The domino theory is a theory that was used in the United States it was based on that if one country in a region falls to communism, then the neighboring countries are also likely to do so.

In Asia, China had become a communist country and North Vietnam was controlled by the communist, so the United States supported South Vietnam in the war so as to prevent the spread of communism.

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