单项选择题

According to the author, when some change in a product is necessary, a manufacturer will choose to ______.

A．lower the production cost
B．hire a better designer
C．improve its quality
D．alter its image
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单项选择题
For whom is the author probably writing this passage
A．Train engineers.
B．General audiences.
C．Professors of statistics.
D．Young children.
单项选择题
The best title for the passage might be ______.
A．Advertising Since the War
B．Advertising and Manufacturers
C．Advertising--England' s Biggest Industry
D．Advertising and Purchasers
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