Which of the Following Would Be a Good Buffer Statement

Which of the following would be a good buffer statement for an indirect bad-news message?

A) If you had read the instructions, you would have noticed that electric heaters should not be left unattended.
B) You were absolutely correct to contact us, and I would love to help you!
C) Thank you for notifying us of the problem you have experienced with your electric heater.
D) I am positive we can find a way to help you.
E) I am afraid that I must share some bad news.