Answer: B. The country followed a policy of interventionism.
Step-by-step explanation:
The Cold War was a period after WWII where the United States and Soviet Russia vied for worldwide dominance by supporting opposing forces n various conflicts whilst avoiding direct confrontation with the other.
As a result of this war, the United States followed a policy of interventionism where they would commit significant resources to countries and forces fighting communism as well as to international organizations in order to limit the influence of the Soviets.