Who spoke about the domino theory, warning that if Vietnam fell to communism, the rest of Southeast Asia would also fall to communism? Harry S. Truman Dwight D. Eisenhower Franklin D. Roosevelt Woodrow Wilson

Option B. President Dwight D spoke about the domino theory.

Explanation:

Eisenhower proclaimed the famous Domino Effect theory which stated that if one country surrenders as a prey for the spread of communism and the same effect would be resulting in the neighboring nations too.

This theory made the Americans to think of the American intervention regarding the Vietnam War. This strategy is popularly called the Containment notion.

Containment notion aimed at preventing or containing the spread of communism in other countries after the fall of French to the Indo-China war.