See question below:
Choose the sentence that goes against common sense.
Options:
- Sentence A: "You need stamps when you post a letter."
- Sentence B: "You need staples when you post a letter."

Reason slowly and give your answer.

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
Staple is not necessary for posting a letter.
The final answer: Sentence B.