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.

[EX Q]: Category: CLASSICAL MUSIC 
Clue: Mendelssohn's "Songs without Words" were once the most popular pieces for this instrument
[EX A]: piano

[EX Q]: Category: UNDER THE "C" 
Clue: Cheese is this part of milk separated from the whey
[EX A]: the curd

[EX Q]: Category: ECONOMICS 
Clue: In 1990, about two-thirds of Americans over 65 relied on this for over half their income
[EX A]:
social security