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.

[EX Q]: Category: APPROBATION 
Clue: In 1982 Lenny Skutnick rescued a passenger on a crashed 737 from this D.C. river
[EX A]: potomac

[EX Q]: Category: WEIGHTS & MEASURES 
Clue: Number of teaspoons in a tablespoon
[EX A]: 3

[EX Q]: Category: TRANSPORTATION 
Clue: The Oregon, California & Mormon trails followed this east-west River in Nebraska
[EX A]:
the platte