You are trying hard to follow a complicated argument from a fellow student, but he/she is using technical terminology you have never heard before. Which of the following expressions do you think is　INAPPROPRIATE to help you in the situation?

A.Excuse me, could you explain the technical terms you’ve just used?

B.If I might interrupt for a moment, it’s just that I couldn’t understand the technical terms you’ve used.

C.I’ afraid that would be too late for me to understand you if I don’t know the technical terms.

D.What you are talking about is really difficult for me to understand.

正确答案：What you are talking about is really difficult for me to understand.