What does it mean to be isolationist?

A. involving one country in the affairs of another country

B. isolating the individual branches of a government from each other

C. isolating cabinet departments and giving each unlimited power

D. not involving a country in the business of other countries

D) not involving a country in the business of other countries

Isolationism is a type of foreign policy where leaders choose to not involve the business of their country with other countries. Isolationism was used in the US after WWI, during the 1920s and 1930s, in response to the horrors of the war.