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.

Q: Category: LARGE EQUIPMENT 
Clue: For smooth travel, ballast tampers & ballast regulators keep the gravel at the right level among these

A: railroad tracks
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Q: Category: GOIN' MONACO A MONACO 
Clue: Citizens of Monaco are not admitted to the casino founded in 1856 in this district

A: monte carlo
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Q: Category: CYCLE OF LIFE 
Clue: Unlike a hybrid car, a hybrid bicycle uses no electricity; it combines features of a road bike & this type

A:
a mountain bike
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