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: MOZART & FRIENDS 
Clue: Mozart wrote a lovely motet for Venanzio Rauzzini, one of these specially treated singers
[A]: a castrato


[Q]: Category: PRESIDENTS 
Clue: After Garfield's death, he refused to move into the White House until it was redecorated
[A]: arthur


[Q]: Category: CONSTELLATIONS, LITERALLY 
Clue: Aquila
[A]:
the eagle