根据上下文选出正确选项

A. It's raining heavily now. B. there are some black clouds in the sky. C. Let's read books at home. D. The wind is blowing gently.

Mum: How's the weather today, Alice?

Alice: It's windy.

Mum: I see. We can go to the supermarket after lunch.

(after lunch)

Mum: Look, Alice, They are moving quickly. It's going to rain.

Alice: Oh, Mum. We can't go out now.

Mum: Yes. But we can go after the rain stops.