Which of the following sentences is courteous？

A.Will you please sign and return this form as soon as possible？

B.As director of your department， you will have to get your employees to use the correct forms.

C.Am I the only one who can read the fiscal report of our company？

D.If you had listened to our agent more carefully， you would know that your policy does not cover accidents outside the UK.

正确答案：Will you please sign and return this form as soon as possible？