Answer:
D. The broadcasting of pro-American propaganda is the best answer as it describes the use of soft power, which involves using cultural, economic, and ideological means to influence other countries. The goal of this approach was to promote American values and ideals around the world, making it less likely that other countries would adopt communist beliefs. The rapid buildup of powerful atomic weapons, deployment of troops, and establishment of the Joint Chiefs of Staff all represent more traditional forms of hard power, which involve the use of military force to achieve political objectives.