Question

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 WW1
The Platt Amendment
Before the Spanish-American war
The monroe Doctrine
war on the central powers
the open door policy

HELP please I cant figure it out T-T