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.

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

[EX Q]: Category: MY CHARLEMAGNE MAN 
Clue: For 46 years Charlemagne was the king of these people who gave their name to a country
[EX A]: the franks

[EX Q]: Category: "BUCK" EYES 
Clue: 2-word term for an enlisted man of the lowest rank
[EX A]:
a buck private