I'll give you a question, please answer with step-by-step reasoning process.
Of the following two sentences, which one is against common sense?\nOptions:\n- Sentence A: "emily came upon a puddle on the sidewalk"\n- Sentence B: "emily came upon a river on the sidewalk"\n

Sentence B
This statement is against common sense because you don't just come upon a river on the sidewalk, as the sidewalk is on dry land and water is not.

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The answer: Sentence B