请教一个单选题so much so that与so much that的区别

请教一个单选题so much so that与so much that的区别
This child is born a mathematician. He loved 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
参考答案是C,请教高手,B和D为什么不对,后三项之间有何区别?多谢!