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: EUROPEAN FICTION 
Clue: This 1915 story says, "His numerous legs, which were pitifully thin... waved helplessly before his eyes"
[A]: metamorphosis


[Q]: Category: POLITICAL PHILOSOPHY 
Clue: The subtitle of this influential 1762 treatise is "Principes du droit politique" ("Principles of Political Right")
[A]: the social contract


[Q]: Category: TELEVISION 
Clue: In Apple's I-Movie program, the effect seen here that's done with photos is named for this TV filmmaker
[A]:
ken burns