You are given a sentence and a question. You're expected to write the correct answer based on the sentence.

Q: Sentence: Gavin is wanting to cross a creek to get home. There are two bridges close to each other and he sees that one has very solid boards making it up, while the other has some boards that are worn down to slivers. Question: Which boards are more likely to break if Gavin walks across them?

A: worn boards
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Q: Sentence: Suppose you look into the sky. Question: Which star is easier to see?

A: Sirius
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Q: Sentence: A glider moves at a lower rate of speed through the treetops then through the air. Question: Which surface is smoother?

A:
air
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