One of the following sentences is nonsensical. Which one is it?\nOptions:\n- Sentence A: "Sam is listening to the teacher."\n- Sentence B: "Sam is listening to the lectern"\n
Step-by-step reasoning:
Sentence B
Sam can look or touch a lectern but unless it has a microphone with a speaker she would have a hard time hearing it.

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So, the answer is Sentence B