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: BODY LANGUAGE 
Clue: When vou're idle or just plain bored, you do this with your pollex digits, literally or figuratively

SOLUTION: twiddle your thumbs

PROBLEM: Category: TWAIN TRACTS 
Clue: "The two went and stood side by side before a great mirror and lo, a miracle: there did not seem to have been any change"

SOLUTION: the prince and the pauper

PROBLEM: Category: DYSFUNCTION JUNCTION 
Clue: It's hard "keeping up with" this family that includes spoiled, sometimes-clothed rich girl Kim & Mrs. Bruce Jenner

SOLUTION:
the kardashians