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.

Category: JAZZ 
Clue: Louis Armstrong's mentor, this jazz "King" was ruined by dental trouble & died while working as a poolroom marker
"king" oliver

Category: VERMONT 
Clue: At 306
bennington

Category: SHHHH! 
Clue: Add these 2 letters to "steal" to get a secretive quality thieves need

t-h