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.
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Question: Category: OSCAR WORTHY? 
Clue: Diedrich Bader voiced Oscar, a saber-tooth in this 2002 animated film

Answer: ice age


Question: Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius

Answer: charlemagne


Question: Category: VARMINTS 
Clue: If this U.S. marsupial keeps getting into my garbage, it won't just be playing dead

Answer:
a possum