【单选题】

Woman: If the weather is this hot tomorrow, we may as well give up the idea of playing tennis in the afternoon.

Man: Oh, I don’t think it’ll last long. The weather forecast says it will cloud over by mid-afternoon.
Question: What does the man mean
A、Weather forecasts are not reliable.
B、They’d better change their minD、
C、The tennis game won’t last long.
D、They shouldn’t change their plan.