Containment in the context of post- WWII international diplomacy on the part of the United States referred to a the policty by which the United States committed itself to containing the flow of illegal immigrants. b the policy by which the United States committed itself to containing its power principally to domestic issues only. c the policy by which the United States committed itself to containing the spread of disease, hunger, and extreme poverty. d the policy by which the United States committed itself to preventing any further expansion of Soviet power.