根据对话内容, 从方框内选出能填入空白处的最佳选项。

A. Who is that? B. Could you please tell Jane about it? C. What's the matter with you? D. I'm sorry to hear that. E. I'm afraid not.

A: Hello! May I speak to Jane, please?

B:  She is out at the moment.

A: Is that Mr. Smith?

B: Yes.

A: This is Tom. Jane invited me to the concert tomorrow. I'd like to come, but I can't.

B:  

A: My mother is ill.

B:  Don't worry. I think she'll be all right soon.

A: I hope so.

B: No problem. I'll leave her the message.

A: Thanks a lot. Bye!