After ten years she changed a lot and look different from--- he used to be.A that b whom c what d who

After ten years she changed a lot and look different from--- he used to be.
A that b whom c what d who

十年后她变的与以前大不相同.c.what
因为前面是from,所以that不对
这里what是指她的look,不是指人
所以whom和who都不对.