请教一个单选题somuchsothat与somuchthat的区别Thischildisbornamathematician.Helovedmathematics____hewillspendawholedaysolvingmathematicalproblemswithoutrememberingtohavemeals.A)andsoB)totheextentthatC)som

　　请教一个单选题somuchsothat与somuchthat的区别

　　Thischildisbornamathematician.Helovedmathematics____hewillspendawholedaysolvingmathematicalproblemswithoutrememberingtohavemeals.

　　A)andsoB)totheextentthatC)somuchsothatD)somuchthat

　　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!