Question

One cause of the Vietnam War was the policy of _____ , which the United States used in an effort to stop the spread of Communism.

A.coup
B.collaboration
C.containment
D.domino theory

Answer 1

During the war years, America's leaders insisted that military force was necessary to defend a sovereign nation — South Vietnam — from external Communist aggression. As President Lyndon B. Johnson put it in 1965, “The first reality is that North Vietnam has attacked the independent nation of South Vietnam

Step-by-step explanation:

hoped it helped.

Answer 2

C. Containment
In general, historians have identified several different causes of the Vietnam War, including: the spread of communism during the Cold War, American containment, and European imperialism in Vietnam