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___________ Which of the following most logically completes the argument? 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 错选了C，答案给的A。A说女士比男士更可能做志愿活动，女士比男士活得长。这不是支持原文了么？可以题目不是应该驳斥吗？

请教may老师这道题的思路

老师，逻辑200题这个题，我觉得B是抬扛呀，原文说这个有关系，这个B选项说没关系，这不也是抬扛的一种吗。我选的A，是因为我觉得我当时设想的答案可以就是cliche在这个环境中是没啥作用的，不会影响elect的最终成功与否，这个A选项我觉得就是表达了我这个意思

老师，这是逻辑200题里面的，您在视频课里讲到的一点，这个less cooperative得有比较，也就是看钱和不看钱的得有比较，原文只有看钱的，没说不看钱的，我非常同意，我当时也是这么想的，所以选择了C

例题9， 间接法-4C1* 6C1 是指4对夫妻中的一对，是二个人. 6C1指6人中的1人， 一对夫妻* 1人，单位数量不对，可以相乘？

例17，如何知道剩下6人不符合电脑系，剩下8人不符合数学系？如何知道是哪些人不符合2个部门？假如题目写if none of the rest of candidates 会表意精确些？

例16， 假如数字变大，选出50本，不可能手算的，我的解题思路看右边， 4C1*6C1* 8C3， 为什么不能这么算？

例题16, 因为要求value of K. 1) 怎么变成条件到结论的推导, sufficient or insufficient? 2) 单看条件2，7平方不是K因子. 怎么会条件2成立？ 因为有6 factors.

例题17 好不清楚的点是 2n= a*b*c*d, 1)为什么要假设质因数(prime factor)里面是否有2.因为本来就是2n，而且条件1提到4个不同的质因数. 2)题目是求确切值？还是说sufficient or insufficient ? 问how many

请问这道题该怎么判断

请问这道题D选项和E选项应该怎么判断？