Jane's work proved ------- than that of their classmates.A.n

Jane's work proved much better than that of their classmates.
Jane's work proved not any better than that of their classmates.
much 属于肯定性词,表达否定(或疑问）概念时使用any；如同 something---》anything; many--any;
不过在口语中或随意性语体中有时也可以不变,代表弱化的否定概念：
I didn't have too much wine yesterday.
I didn't have any wine yesterday.
再问： 就是说要选B？ 严格点说，是不是not much better不算是个正确的表达方式？所以在口语中允许存在？
再答： 是这样，作为单选题，只能是B了。