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: FLAGS 
Clue: Christopher Columbus' flag bore a cross with their initials on either side
ferdinand & isabella

Category: THE FICTIONAL LAND OF OZ 
Clue: This paving material of the road to the Emerald City is in need of repairs
yellow brick

Category: COLLEGE SPORTS NICKNAMES 
Clue: At the California college named for John Greenleaf Whittier, no team nickname could be fittier

poets