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: MARK ANTONYMS 
Clue: The traditional mark of someone who can't sign his name has this opposite in tic-tac-toe
o

Category: WHAT'S THE MARTYR WITH YOU? 
Clue: This man whose feast day is Dec. 26 was the 1st Christian martyr; his story is told in the Acts of the Apostles
saint stephen

Category: COLLEGES & UNIVERSITIES 
Clue: Former President Cleveland was one of the trustees of this New Jersey university that elected Woodrow Wilson its head

princeton