Which of the following sentence is NOT an elliptical sentence（省略句)？A．I want to improve

Which of the following sentence is NOT an elliptical sentence(省略句)？

A．I want to improve my French but I don"t know how.

B．Some of the answers were correct while I don"t know which.

C．This is what I want to say and I hope that you can follow me.

D．I touched the door to see if the dirt on it could be eliminated, and it surely could.

请帮忙给出正确答案和分析，谢谢！