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補全短文

When a consumer finds that an item she or he bought is faulty or in some way does not live up to the manufacturer‘s claim for it， the first step is to present the warranty （保單）， or any other records which might help， at the store of purchase. In most cases， this action will produce results. However， if it does not， there are various means the consumer may use to gain satisfaction.

The main idea of this paragraph is __________.

A.In person

B.Polite Consumers

C.Show Records

D.Store Manager

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