TASK DEFINITION: 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.
PROBLEM: Category: BIG CITY LIFE 
Clue: The beginning of this regulation of land & building use dates from a 1916 New York City ordinance

SOLUTION: zoning

PROBLEM: Category: ALL ABOUT TROMBONES 
Clue: The most common trombone bears the name of this male singing voice

SOLUTION: tenor

PROBLEM: Category: DOUGH 
Clue: No peeking! This building is portrayed on the back of the $20 bill

SOLUTION:
the white house