单项选择题

According to this passage, various types of packaging come into existence to ______.

A．meet the needs of consumers
B．suit all kinds of products
C．enhance the market position of products
D．introduce new products
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单项选择题
What started the public and Congressional concern about deceptive packaging rumpus
A．Consumers' complaints about the changes in the package size.
B．Expensive packaging for poor quality products.
C．A senator's discovery of the tricks in packaging.
D．The rise in the unit price for many products.
单项选择题
Consumers are concerned about the changes in the package size, mainly because ______.
A．they hate to see any changes in things they are familiar with
B．the unit price for a product often rises as a result
C．they have to pay for the cost of changing package sizes
D．this entails an increase in the cost of packaging
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