单项选择题

According to the passage, which of the following can be allowed

A．The change of one's IQ.
B．The change of IQs for one's descendants.
C．To be more beautiful.
D．To be free from certain disabilities.
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单项选择题
Many welfare officials are motivated to increase their clients because ______.
A．they really care about the dependants
B．they are aiming at a greater power
C．they encourage the parasiticism
D．they profit a lot from their clients
单项选择题
It can be inferred from the passage that the author is most probably a ______.
A．university professor
B．political critic
C．social welfare worker
D．congressman
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