GWD 26-31 volunteer vs life span

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. How-

ever, 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 through-

out 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.

答案选C. 我选A 答案中C只是掩盖症状，怎么能推出作义工的人还是比不作的人活的长。我觉得倒有削弱的作用。这样就不能够及时发现病症。

see the discussion above. it is in the air.

where?