How to comfort in case that the passenger complains about the delay?

A.We are sorry about that. Thank you for your understanding and cooperation.

B.We didn’t expect to delay, either.

C.You would be informed if we are going to take off.

D.I understand your feeling.

正确答案：We are sorry about that. Thank you for your understanding and cooperation.；We didn’t expect to delay, either.；You would be informed if we are going to take off.；I understand your feeling.