Why did the United States believe the Marshall Plan was necessary?
A. The United States believed it would prevent the Soviet Union from rebuilding its
military.
B. The United States believed it would help contain the spread of fascism
C. The United States believed it would prevent Germany from rebuilding its
military
D. The United States believed it would help contain the spread of communism,

Explanation:

In 1947, President Harry S. Truman pledged that the United States would help any nation resist communism in order to prevent its spread. His policy of containment is known as the Truman Doctrine.

The Truman Doctrine demonstrated that the United States would not return to isolationism after World War II, but rather take an active role in world affairs.

To help rebuild after the war, the United States pledged $13 billion of aid to Europe in the Marshall Plan.

D

Explanation:

After the Marshall Plan “no European nation felt communism”