For this chain-of-thought reasoning and answer, what was the question?
The sky is atmosphere and already starts from the ground, hence can not fall.
 A: Sentence A

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Q: Which of the following sentences is nonsensical?
Options:
- Sentence A: "The sky is falling."
- Sentence B: "The sky is blue."
