I'll give you a question, please answer with step-by-step reasoning process.
Which of these sentences doesn't make sense?\nOptions:\n- Sentence A: "When it rains, you shouldn't take an umbrella."\n- Sentence B: "When it rains, you should take an umbrella."\n

Sentence A
If you don't take an umbrella, you'll get wet and catch a cold.

.

So, the answer is Sentence A