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: ANIMAL VERBS 
Clue: Nag or pester persistently

Answer: badger


Question: Category: MATHLETES 
Clue: John Nash has a beautiful mind that contributed to this "theory" of strategic decision making

Answer: game theory


Question: Category: MAKE YOUR WAY TO NORWAY 
Clue: The name of this leader of Norway during World War II has come to mean "traitor"

Answer:
quisling