[求助]求助一道逻辑题

lujibo

31. GWD26-Q31

Which of the following most logically completes the argument?

When people engage in activities that help others,
        their brain releases endorphins, the brain’s natural opiates, which induce in people a feeling of well-being. It has been suggested that regular release of endorphins increases people’s longevity. And a statistic on adults who regularly engage in volunteer work helping others shows that they live longer, on average, than adults who do not volunteer. However, that statistic would be what we would expect even if volunteering does not boost longevity, because    .

 

A.      in the communities studied, women were much more likely to do regular volunteer work than men were, and women tend to live longer than men do.

B.       the number of young adults who do regular volunteer work is on the increase

C.      the feelings of well-being induced by endorphins can, at least for a time, mask the symptoms of various conditions and diseases, provided the symptoms are mild.

D.      it is rare for a person to keep up a regular schedule of volunteer work throughout his or her life.

E.       Some people find that keeping a commitment to do regular volunteer work becomes a source of stress in their lives.

 

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参考答案是A，但是觉得A逻辑上好像说不过去，请高手指点。谢谢

ggghost

调查说 平均而言，义工比非义工长寿，但导致义工长寿的原因是，更多比例的女性为义工，女性寿命更长。也就说义工相对非义工在统计数据上寿命长的原因是来自于男女样本的不平衡性，作义工本身并不会延长寿命

[此贴子已经被作者于2009-6-14 17:58:04编辑过]

javafirst

我选A，但确实很容易选E的，等有时间我来说明下。

 

lujibo

谢谢大牛，原来是这个意思，多谢！