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.