Question: Which of the following sentences is nonsensical?
Options:
- Sentence A: "She unlocked the door with a lighter."
- Sentence B: "She unlocked the door with a key."

Please answer this question gradually:

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.
user
A lighter is used to set things on fire, not unlock doors. So the answer is Sentence A.