All of the following actions or agreements promoted the containment of communism except a. the marshall plan. b. the truman doctrine. c. the manhattan project. d. the principles of the yalta accords

The following actions or agreements promoted the containment of communism: The Marshall Plan, The Truman Doctrine, and the Principles of the Yalta Accords. The only agreement that does not promote the containment of communism is the Manhattan Project. The Manhattan Project was the first to produce nuclear weapons during World War II. It was led by the United States with the partnership of United Kingdom and Canada.

The answer would be letter C. 

 Egocentrism.

Explanation:

Adolescents are very focused on themselves and therefore, are very sensitive to the social cues of their peers as well.