---Would like to go to the library with me this afternoon?

---       ,but I have to ask my parents first.

A．Yes,I’d love to

B．Yes , let’s go

C．No. I won’t.

D．That’s all right

不同风险对策的适用性需从( )方面考虑。

A．效果

B．代价

C．效果和代价

D．效果或代价