Use your head. nothing taught by others can have the same effect on you as ________learned by yourself．

A．those

B．what

C．that

D．the one

在城市水厂规划中，新建水厂布局，需要考虑的因素有( )。

A．水源条件

B．水质条件

C．建设条件

D．配水条件

E．安全条件