单项选择题

Questions 181-185 refer to the following two e-mail messages.
To: Rex Roeges, Customer Service Department <roeges@books.com>
From: Dave Palmer <palmer@mail2.com>
Re: Lost book
Dear Mr. Rex Roeges,
I am writing this e-mail concerning a book that I ordered through your company, The Computer Networks 4th edition, order number 20035. I placed the order last month and still have not received the book.
I visited your website and confirmed that my shipping information was correct, and that my credit card has been charged for the book; the website also indicates that the book was shipped using your "Global Carrier" service the day after I ordered it. Considering that "Global Carrier" shipments typically take two weeks to arrive, I should have received my goods a week ago at the latest. However, my post office informed me they have neither received nor delivered the book. Can you let me know what is going on as soon as possible
Dave Palmer
To: Dave Palmer <palmer@mail2.com>
From: Rex Roeges <roeges@books.com>
Re: Lost book
Dear Mr. Palmer,
Thank you for contacting us. It is important to us that our customers are satisfied with our service, so I am very sorry to hear that you have not received your merchandise.
I looked up your order number and discovered that the book has not been sent out. I have rectified this mistake on our website and sent the book to you via express mail. It should arrive within two business days. With the book I have enclosed a coupon for half off your next order.
Again, I apologize for the inconvenience. If you have any more questions or need further assistance, please contact me at 602-385-0256, or e-mail me at <roeges@noble. com>.
Sincerely,
Rex Roeges
Rex Roeges, Customer Service Department
Nobel Bookstore
How did the company attempt to compensate the customer

A. It sent him a complimentary book.
B. It gave him a voucher for a 50% discount.
C. It removed the charge from his credit card.
D. It gave him the book for half off.