Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: If you closed an umbrella when it is raining, you will get wet.
 The question and answer:
Which of these sentences doesn't make sense?
Options:
- Sentence A: "It is helpful to carry an umbrella when it is a rainy day."
- Sentence B: "It is helpful to close an umbrella when it is a rainy day."

The answer is Sentence B