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.

[Q]: Category: WORLD EVENTS 
Clue: In 2003, 120 years after it made headlines, a book on this was subtitled "The Day the World Exploded"
[A]: the eruption of krakatoa


[Q]: Category: MUSIC WORDS 
Clue: Before it acquired its musical meaning in the early 20th century, it was baseball slang for "pep" or "energy"
[A]: jazz


[Q]: Category: PRESIDENTIAL FIRSTS 
Clue: The first president to cross the Atlantic Ocean while in office, he did so to meet with other world leaders
[A]:
wilson