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 simplicity, answers should be in all lower cased letters.
PROBLEM: Category: SUPERHEROES 
Clue: For a while the Hulk was gray, but now he's this color

SOLUTION: green

PROBLEM: Category: AT THE KENNEDY CENTER 
Clue: Can you hear me?  This rock opera by The Who was a big hit at the Kennedy Center in 1994

SOLUTION: tommy

PROBLEM: Category: CONSTITUTIONAL AMENDMENTS 
Clue: Of particular interest to the NRA is the amendment that allows us "to keep & bear" these

SOLUTION:
arms