Answer:
b. Reduce its role in world affairs.
Step-by-step explanation:
With Woodrow Wilson as president and an internationalist, the US had participated in World War I, tilting the tide in favor of the Western Allies. Nevertheless, isolationist views and feelings came back after the end of the war. The Senate refused to ratify the Treaty of Versailles and the treaty of the League of Nations. Public opinion and politicians were persuaded that the USA should reduce its involvement in world affairs.