I'll give you a question, please answer with step-by-step reasoning process. He always wanted a man cave, but with the sofa bed it doubled as a guest room down in the what?\nOptions:\n- basement\n- guest room\n- treehouse\n- living room\n- horseradish

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A basement is made at the down of the building. He always wanted a man cave, but with the sofa bed it doubled as a guest room down in the basement.
The answer: basement.
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