单项选择题

Michael Fraser
43-A Raglan Rd.
North Dublin, 4478
Ph: (082) 331-8876
March 12,2010
Accounts Department
South-East Power Supplies
First Avenue
Dublin, 2008
Dear Madam or Sir,
I was surprised and disappointed by a letter from your agency threatening me with the disconnection of my power supply. I am an elderly pensioner suffering from a variety of ailments, and I expect to be treated with more consideration, especially as I have faithfully paid all my electricity bills for the last 45 years!
The reason for my anger is that I have not only paid the bill but also informed you that I had paid it. So it appears that I made a special trip to your office on the morning of March 5 for nothing. One of your employees even told me that the mistake would be rectified and apologized!
Here, once again, are the details of my receipt: the receipt number is AQ3567X56-1. It is dated February 2, 2010. It is for the amount of $47.50 and covers the supply of service between January 1 and 31.
I trust that you will correctly rectify your records this time.
Yours sincerely,
Michael Fraser

Why is Mr. Fraser angry ?()

A.His electricity was recently cut off.
B.He has not yet received his paycheck.
C.He was billed for unnecessary charges.
D.He was falsely accused of nonpayment.