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: 20th CENTURY AUTHORS 
Clue: A novel set during the Depression earned this author a 1940 Pulitzer Prize & contributed to him winning a Nobel Prize in 1962

Answer: john steinbeck


Question: Category: FOOD SCIENCE 
Clue: In 2002 Japanese scientists discovered it contains the enzyme Lachrymatory-Factor Synthase

Answer: onions


Question: Category: SCIENTIFIC FIRSTS 
Clue: The first object in our solar system discovered by telescope was not a planet but one of these

Answer:
a moon