请帮忙看看下面这道题

It is an oversimplified view of cattle raising to say that all one has to do with cattle is leave them alone while they feed themselves, corral them, and to drive them to market  wjen the time is ripe.

Key is C: all one has to do with cattle is leave thwm alone while they feed themselves and then corral them and

为什么不能选D：the only thing that has to be done with cattle is leave them alone while they feed themselves, corral them, and

请问all one在这里的用法？

all one不是连在一起的,one has to do with cattle 来修饰all,意为一个人不得不做的所有事情是.....

D项明显缺陷是用了被动