Please answer the following question by reasoning step-by-step.
Which of these sentences doesn't make sense?\nOptions:\n- Sentence A: "you can walk into a room straightly if the door is open"\n- Sentence B: "you can walk into a room straightly if the door is closed"\n

Sentence B
One cannot enter a room if the door is closed unless one opens the door to provide entry into a room.

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Therefore, the answer is Sentence B