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: STATES' SOUTHWEST CORNERS 
Clue: This state's is just north of the Columbia River
[A]: washington


[Q]: Category: EARLY ART 
Clue: This art form of setting stones or glass into mortar was the main decorative art of the Byzantine Empire
[A]: mosaic


[Q]: Category: BEASTLY HOMONYMS 
Clue: Pulled behind a truck
[A]:
towed