Answer:
A. The spread of American culture in South Vietnam to display the benefits of capitalism.
Step-by-step explanation:
Americanization was the most important part of the reform program called the New Frontier, introduced by John F. Kennedy in 1960. This program's object was to support the improvement of both capitalism and Americanization in other countries. Explained in a different way, Americanization was introduced to perpetuate the Truman Doctrine as a preventive measure to communism and the domino effect.