Which of the Following Statements Is a Good Closing Statement

Multiple Choice

Which of the following statements is a good closing statement for a claim message?

A) You must resolve this problem by May 22.
B) I cannot recommend your services to potential customers after this incident.
C) Please resolve the issue by Monday so that I can ship my products on time.
D) On the basis of my negative experience with your inferior product, I demand a refund.
E) If you do not fix this problem, I will report you to the Better Business Bureau.