I'll give you a question, please answer with step-by-step reasoning process.
Which of the following sentences is nonsensical?\nOptions:\n- Sentence A: "Harry is sweeping the floor with a knife"\n- Sentence B: "Harry is sweeping the floor with a broom"\n

Sentence A
A knife doesn't have bristles, so it is an unrealistic tool to use for sweeping a floor.

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Final answer: Sentence A