弱弱的问一道题...真是没想通为什么选A

king12wolf

112.    (29286-!-item-!-188;#058&003696)    (GWD 26-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

hzd515976083

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.
到这为止，都在说一件事情：做好事--->活得长（有因果关系）
However, that statistic would be what we would expect even if volunteering does not boost longevity, because __________.
这里要说的意思是，即使“做好事”不会导致“活得长”，那么我们得到的数据结果仍然是一样的，因为。。。

A项指出了女人比男人活得长，并且女人更经常做好事。就是说即使“做好事”不会导致“活得长”，但是因为“做好事”的大部分是女人，而女人比男人活的长，那么数据看起来就好像是“做好事”导致“活得长”

类似的逻辑就好像，多吃糖不刷牙会导致牙坏，但是多吃糖不刷牙的大部分是10岁以下儿童，那么这样的数据就很可能被误读成年龄在10岁以下会导致牙坏，但这显然不合理

king12wolf

谢谢楼上的指点!!!明白了~~

sugaryun

我的思路是你可以把题目当作是加强型题。A提出的是一个事实与结论匹配的情况，不必有必要性。