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: YOU'VE GOT SHE MAIL 
Clue: In 1848 she wrote to Belgium's King Leopold, "Great events make me quiet and calm; it is only trifles that irritate my nerves"
victoria

Category: ANIMALS 
Clue: These mollusks, not oysters, are the most common source for freshwater pearls
mussels

Category: YOU'RE "NUT"s! 
Clue: Tasty term for the weighted ring used by hitters to warm up

doughnut