TASK DEFINITION: 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.
PROBLEM: Category: MUSEUMS OF GERMANY 
Clue: A Baden-Baden museum devoted to the works of this Russian imperial jeweler opened in 2009

SOLUTION: fabergé

PROBLEM: Category: BUSINESS & INDUSTRY 
Clue: This stagecoach company owned the Pony Express during the last few months of its existence

SOLUTION: wells fargo

PROBLEM: Category: 7-LETTER WORDS 
Clue: The Count of Monte Cristo spent 14 years in one of these dank places in the Chateau D'If

SOLUTION:
dungeon