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: OPERAS BY CONTINENT 
Clue: "Aida "
[A]: africa


[Q]: Category: THEIR FIRST FEATURE FILMS 
Clue: June Lockhart debuted as a Cratchit child in this 1938 film, with her real parents playing Mr. & Mrs. Bob Cratchit
[A]: a christmas carol


[Q]: Category: DOUBLE-LETTER WORDS 
Clue: Effervescence, in liquid
[A]:
fizz