Problem: Given the question: Here's a question: James picked glass walls because they let more light into the room. Why did they let light in?  Here are possible answers to this question: - inventive - half empty - recyclable - clear - very fragile  I believe the correct choice is "clear", here's why:
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The answer is:
glass is transparent


Problem: Given the question: Here's a question: What can you use hear other people and be heard yourself?  Here are possible answers to this question: - mouth - song - radio - ears - telephone  I believe the correct choice is "telephone", here's why:
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The answer is:
telephone is hear other people heard ourself


Problem: Given the question: Here's a question: People using a machine gun are a part of what?  Here are possible answers to this question: - quake 2 - arsenal - in a - armory - military service  I believe the correct choice is "military service", here's why:
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The answer is:
machine guns are mostly made for war.