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 consistency, answers should be in all lower cased letters.
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Question: Category: E BEFORE I 
Clue: Hold your horses! & to make it easier, use these straps that attach to the bit of the bridle

Answer: reins


Question: Category: TAKE IT "EASY" 
Clue: "You're an alien and I'm from the Valley" is a line from this 1989 sci-fi comedy

Answer: earth girls are easy


Question: Category: VEGGIES' SCIENTIFIC NAMES 
Clue: Lactuca sativa, it's also a slang term for paper money

Answer:
lettuce