单项选择题


Questions 17 to 20 are based on the following passage. At the end of the passage you will be given 20 seconds to answer the questions.
Now listen to the passage.
What does the talk tell us

A.How to settle the consumer’s complaint about a faulty item.
B.How to make an effective complaint about a faulty item.
C.How to avoid buying a faulty item.
D.How to deal with complaints from consumers.