请教一道LR题

chasingd2012

Poor nutrition is at the root of the violent behavior of many young offenders. Researchers observed that in a certain institution for young offenders, the violent inmates among them consistently chose, from the food available, those items that were low in nutrients. In an experiment, some of the violent inmates were placed on a diet high in nutrients. There was a steady improvement in their behavior over the four months of the experiment. These results confirm the link between poor nutrition and violent behavior.

D. A further study investigated young offenders who chose a high-nutrient diet on their own and found that many of them were nonviolent.


E. The violent inmates in the institution who were not placed on a high-nutrient diet did not show an improvement in behavior.


请教一下D为什么不对？答案是选E.


谢谢！

sdcar2010

Because the word MANY in D). In LR, MANY = not zero, so it could be anything from 1 to 100 out of the total of 100. Therefore D) could mean that ONLY one young offender who chose a high-nutrient diet on his/her own is nonviolent and the rest of those who chose a high-nutrient diet are violent!

So D is wrong.

sdcar2010

E) on the other hand, provide a perfect case for a control group to support the experiment mentioned in the argument. It reinforces the connection (one to one relationship) between the two phenomena.

chasingd2012

oic, thanks very much!!

wli18

我不记得这题的问题是什么了，不过D中 young offenders who chose a high-nutrient diet on their own跟原文的some of the violent inmates were placed on a diet high in nutrients 其实是两回事。我觉得LR里面有时候最难的是很难体会正确答案跟错误选项的差异。。。即使已经知道正确答案的选择原因