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: THE SPORTS CHANNEL 
Clue: Fly balls & sacrifices are parts of this sport
[A]: baseball


[Q]: Category: RIVERS 
Clue: In 1951 it was determined that this river's source was in the Sierra Parima of Venezuela
[A]: the orinoco


[Q]: Category: PASTIMES 
Clue: The FCC assigns call signs, like N8DNR, to use in this hobby
[A]:
ham radio