A. showing the faulty item to the manufacturer B. explaining exactly what is wrong with the item C. saying firmly that the item is of poor quality D. asking politely to change the item 参考答案:B 答案解析:[解析] C、D所表达的意思与文章不符,故先排除,再由第四段中的第一句“and... question.”可得到答案为B。