You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: "TRIPLE" JEOPARDY! 
Clue: Collective term for victories in horse racing's 3 major events
triple crown

Category: WORLD CAPITALS 
Clue: This capital city of 113,000 is the closest national capital to the Arctic Circle
reykjavík

Category: "PEACE" ON EARTH 
Clue: This overseas humanitarian sevice was originally part of the U.S. State Department

peace corps