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.
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Question: Category: BELGIUM, BELARUS OR BELIZE 
Clue: It's part of the British Commonwealth of Nations

Answer: belize


Question: Category: BRAIN STRAIN 
Clue: Appropriately, this stadium has hosted the NFL Super Bowl more than any other

Answer: louisiana superdome


Question: Category: EXTREME ANIMALS 
Clue: One of the slowest & sleepiest animals is the 3-toed species of this mammal that can sleep 16 hours a day

Answer:
the sloth