_____, and the problem will be worked out.

A．If you have a bit more effort

B．Having a little effort

C．A bit more effort

D．There being a little effort

直到今天，电吹风在（）等方面给消费者提供了更多的选择。

A.安全

B.外形

C.款式

D.体积

E.材料

F.颜色

G.容量