单项选择题

Arnold Parker
43 Leonard Street
Atlanta, GA 02109
Date: July 20
Dear Mr. Parker,
I am writing to withdraw my membership from your online languages courses. In your advertisement, you said that if I purchase a course online, I can get another instructor"s course free. In addition, I was told that I would receive three textbooks free of charge. I paid $100 through my credit card and I chose the class with Instructor Kevin Smith.
I was very excited to receive all three textbooks. I was greatly disappointed, however, when I opened the books. I found out that the textbooks are not for the class that I purchased. Actually, I should download the textbooks and print out them by myself. Since I don"t have a printer in my house, it is very inconvenient for me. I was also frustrated with your free course which was recorded 8 years ago. You never explained this when I called you about the class.
I also got the impression that I would get a book certificate that I can use to purchase books and other materials from you. I did not find a book certificate in the package. I wonder what happened to all the guarantees you have indicated in your advertisement. Please let me know what action you will take to correct this mistake. I hope to hear from you in a week"s time; otherwise, I think I am entitled to receive a full refund.
Jim Morrison Why was this letter written