Question

What was the domino theory?

the theory that if South Vietnam became Communist, Communism would spread throughout the rest of Southeast Asia
the opinion that war is just a game played between nations, but that it becomes horribly real to those taking part in it
the view that fighting in Southeast Asia was inevitable for the United States because the war was destined to happen
the belief that domination of Southeast Asia was a critical factor for the Western world to expand socialism
A??

Answer 1

Yes, A.