Answer:
The answer is D
Explanation:
As communist elements began to create civil unrest in the non-communist nations of Greece and turkey Truman asked Congress to approve age to support free peoples resisting foreign control. This containment of communism is known as the Truman doctrine (1947)
Providing military aid to Greece and Turkey was a decision by President Harry Truman can be considered as an example of policy of containment known as Truman doctrine.
Truman doctrine was an American policy which was passed to contain Soviet geopolitical expansion during the Cold War by providing military aid to Greece and Turkey.
America gave direct military support first time by providing military aid to Greece and Turkey under the Truman doctrine.
Therefore, option D, providing military aid to Greece and Turkey is correct.
Learn more about Truman doctrine, here,
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