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 consistency, answers should be in all lower cased letters.
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Question: Category: EVERYTHING FROM C TO D 
Clue: In math: raised to the third power

Answer: cubed


Question: Category: U.S. BODIES OF WATER 
Clue: You'll find the Big Branch National Wildlife Refuge on the shore of this big lake in Louisiana

Answer: lake pontchartrain


Question: Category: SWEET SONGS 
Clue: This crooner's "Sweet Leilani" from the 1937 film "Waikiki Wedding" won an Oscar for best song

Answer:
bing crosby