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: PHILOSOPHY 
Clue: This ancient philosopher wrote about a theory of forms in his "Republic"

Answer: plato


Question: Category: MAGAZINES & NEWSPAPERS 
Clue: The USA’s 2 top-selling magazines are Reader’s Digest & TV Guide; this “Better” magazine comes in third

Answer: better homes and gardens


Question: Category: FRENCH PHRASES 
Clue: Strictly required according to etiquette or usage, such as wearing a bow tie with your tux

Answer:
de rigueur