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 19th CENTURY 
Clue: 1853 purchase that brought the contiguous U.S. about up to its present area
[A]: the gadsden purchase


[Q]: Category: HANNA-BARBERA DOGS 
Clue: In one episode of the original "Jetsons", a millionaire tried to take him away
[A]: astro


[Q]: Category: COMMERCIALS 
Clue: It's "That heavenly coffee"
[A]:
chock full o\'nuts