单项选择题

The author uses the "little Billy" example to_________.

A．drive home the meaning of overjustification effect
B．prove bad things do happen to good people
C．dissociate one group of "good" people from another
D．show sympathy for people like Billy

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单项选择题

At the end of the article, the author seems to suggest_________.

A．there is no solution to the flaw in the Internet technology
B．there is much worry within the academic circle about Internet security
C．US government is indifferent to the hacker attacks
D．Internet traffic is easily vulnerable to hack attacks