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.

Category: ANCIENT TIMES 
Clue: Because of his work there, you could call the astronomer Hipparchus "the colossus of" this island
rhodes

Category: LET'S TAKE A TRIP 
Clue: When this country broke away from Ethiopia in 1993, Haile Selassie Avenue in the capital became Harnet Avenue
eritrea

Category: TRA-LA!  IT'S MAY! 
Clue: May Day festivities date back to an ancient festival honoring this Roman goddess of flowers

flora