Answer: A.Send American Troops to fight in Viatnam
Explanation:
The perfect answer to this question would be "The United States president made the Truman Doctrine which encourage any countries under threat of Communism to be on his side"
The closes answer to that is A Hope it's Right
United State Of American and Canada
Basically, Soviet Union imposed lack of freedom and self-determination on the people's of Eastern Europe. The governments chosen by people before the war were abandoned in favour of puppet governments which often took bad politically determined decisions, such as rejecting Marshall's plan.
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They are both a slanted place