【单选题】

Passage 1 Complaining about faulty goods or bad service is never easy．Most people dislike making a fuss．But if something you have bought is faulty or does not do what was claimed for it, you are not asking for a favor to get it put right．It is the shopkeeper’s responsibility to take the complaint seriously and to replace or repair a faulty article or put right poor service, because he is the person with whom you have entered into an agreement. Complaints should be made to a responsible person．Go back to the shop where you bought the goods, taking with you any receipt you may have．If you telephone, ask the name of the person who handles your enquiry, otherwise you may never find out who is to deal with the complaint later. Even the bravest person finds it difficult to stand up in a group of people to complain．So, if you do not want to do it in person, write a letter．Stick to the facts and keep a copy of what you write．At this stage you should give any receipt numbers, but you should not need to give receipts or other papers to prove you bought the article．If you are not satisfied with the answer you get, or if you do not get a reply, write to the managing director．Be sure to keep copies of your own letters and any letter you receive. According to the passage, when should you write to the managing director

A、If you are not satisfied with the answer you get.
B．After sending out the first letter.
C．If you are not satisfied with the article you have bought.
D．After talking to the responsible person.