— Having many helpers makes a task easier and faster to complete.

— I think so. ____________.

A．Many hands make light work.

B．Actions speak louder than words.

C．The early bird catches the worm.

D．The more you learn, the more you know

下列说法或操作，其中正确的是（　　）

①做实验时可用手直接取用砝码       

②用托盘天平称量50.56g KCl

③用酒精可以从饱和碘水中萃取碘

④让一束光通过胶体，从垂直于光线的方向可以看到一条光亮的“通路”

⑤从含有少量氯化钠的硝酸钾溶液中提取硝酸钾可用结晶的方法．

A．①②③④⑤

B．②④⑤

C．②③④

D．④⑤