Which American Foreign Policy Action Is Consistent with Isolationism

Which American foreign policy action is consistent with isolationism?

A) leading mediation to end the Russo-Japanese War under President Theodore Roosevelt
B) rejection of membership in the League of Nations under President Woodrow Wilson
C) military involvement in Kuwait and Iraq under President George H. W. Bush
D) entry into the World Trade Organization under President Bill Clinton
E) invasion of Iraq to enforce United Nations Security Council resolutions under President George W. Bush