so much so that 用法

问题描述:

so much so that 用法
This child is a born mathematician.He loves mathematics___ he will spend a whole day solving mathematical problems without remembering to have meals.
A.and so
B.to the extent that
C.so much so that
D.so much that
为什么选C不选D呢,二者有什么区别呢,

so much so that
其实是一个固定搭配
意为:到这样的程度以致...