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: JON STEWART'S AMERICA 
Clue: This 1215 document "served as a wake-up call that Europe would be forced to answer...in about 500 years"
the magna carta

Category: IT'S A DOG'S LIFE 
Clue: Familiar to fans as "Marmaduke", this lovable breed was a favorite of Elvis, who had 2 at Graceland
a great dane

Category: BILL CLINTON'S FAVORITE BOOKS 
Clue: We must confess, William Styron's "The Confessions of" this man shows up

nat turner