How was the United States’ policy of containment after World War II related to the development of the Marshall Plan?

Containment was the U.S. policy of preventing communism from spreading to new countries. The Marshall Plan provided economic aid to help rebuild European nations after World War II, with the belief that stronger, more stable economies would make those countries less likely to turn to communism. Therefore, the correct choice is D: the United States believed Marshall Plan aid would help contain the spread of communism.

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