Question

Pleaaase help!!
America's policy changed from isolationist to more active involvement in the world. Select an I for those items that evidence isolationism, a W for those for world activism, and an H for those that indicate activism only in the Western Hemisphere.

-The Panama Canal
-Early part of World War I
-The Platt Amendment
-Before the Spanish-American War
-The Monroe Doctrine
-War on the Central Powers
-The Open Door Policy