Consider the question. Of the following two sentences, which one is against common sense?
Options:
- Sentence A: "My sister went to a concert to watch her favorite idol sing"
- Sentence B: "My sister went to a concert to watch her favorite cat sing"

 What is the step-by-step reasoning process to arrive at the answer: Sentence B?

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
Cats are not able to sing and do not give concerts.