[求助] feifei-1-->babypace转移

vivianzly

Although 90 percent of the population
believes itself to be well informed about health care, only 20 percent knows
enough about DNA. So apparently at least 80 percent of the population does not
know enough about medical concepts to make well-informed personal medical
choices or to make good public policy decisions about health care.

The argument’s
reasoning is questionable because the argument fails to demonstrate that

(A) those people who
can understand news stories about DNA are able to make well-informed personal
medical choices

(B) more than 20
percent of the population needs to be well informed about health care for good
public policy decisions about health care to be made

(C) one’s being able
to make well-informed personal medical choices ensures that one makes good
public policy decisions about health care

(D) an understanding
of DNA is essential to making well-informed personal medical choices or to
making good public policy decisions about health care

(E) since 90 percent
of the population believes itself to be well informed about health care, at
least 70 percent of the population is mistaken in that belief



答案是D。但我认为A也是可以的，是不是可以这么认为如果没有D， 那么答案就是A了？还是A是不对的呢？

[此贴子已经被作者于2005-5-6 15:08:14编辑过]

goyce36

我也不明白A，解释上说A支持作者。为什么？？

salitis

You need to understand the difference between sufficient and necessary.