单项选择题

The first paragraph of the text deals mainly with the earth atmosphere's ______.

A．sheltering effect
B．reviving effect
C．invigorating effect
D．cleansing effect
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单项选择题
Many advertisers defend the targeting of children because ______.
A．it is up to parents to monitor their children
B．children understand what an advertisement is trying to do
C．children are provided a game in return for the information
D．no actual sales take place
单项选择题
In the text the author wants his marketers to understand that ______.
A．advertising to children must stop
B．a libertarian view in advertising is unethical
C．advertising to children must have a clear purpose
D．children must be treated differently when advertising
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