A. My pleasure. B. All right.

C. Thank you all the same D. I'm sorry to hear that

【答案】C

【解析】考查情景对话。句意：――对不起，我不能帮你。――不管怎样还是要谢谢你。My pleasure愿意为您效劳；All right.好吧；Thank you all the same 不论怎样我还是要谢谢你；I'm sorry to hear that听到这事我很难过。从语境可知C符合。