The primary reason given by U.S. leaders to justify military involvement in Vietnam was that it would (5 points)

Apromote reconstruction after World War II
Bmaintain the policy of d tente
Cfulfill prior United Nations obligations
Dkeep communism from spreading throughout the region

Verified Answer :

The primary reason given by U.S. leaders to justify military involvement in Vietnam was that it would "d. keep communism from spreading throughout the region," since this was part of the US policy of "containment" during the Cold War.