总觉得答案不对劲， 真诚请教

cwwlys

GWD7-Q17:
Of patients over 65 years old who survived coronary bypass surgery—a procedure widely prescribed for people with heart disease—only 75 percent benefited from the surgery.  Thus it appears that for one in four such patients, the doctors who advised them to undergo this surgery, with its attendant risks and expense, were more interested in an opportunity to practice their skills and in their fee than in helping the patient.
Which of the following, if true, most seriously undermines the argument?

A.    Many of the patients who receive coronary bypass surgery are less than 55 years old.
B.    ossible benefits of coronary bypass surgery include both relief from troubling symptoms and prolongation of life.
C.    Most of the patients in the survey decided to undergo coronary bypass surgery because they were advised that the surgery would reduce their risk of future heart attacks.
D.    The patients over 65 years old who did not benefit from the coronary bypass surgery were as fully informed as those who did benefit from the surgery as to the risks of the surgery prior to undergoing it.
E.    The patients who underwent coronary bypass surgery but who did not benefit from it were medically indistinguishable, prior to their surgery, from the patients who did benefit.

答案说是E， 我怎么觉得B更好。

FREE小宝

个人认为答案E应该是没有问题的：
   A选项：不知所云，而且看不到和题目的关联~~
      B选项：潜在的好处（benefits）只是在手术成功之后才能体现，而题目主要还是在强调风险之下医生对于手术的目的~~
   C选项和D选项：貌似都是以patients为主题的例证，与题目有点偏离~~
      E选项：只有两种patients的medically indistinguishable才能使得医生对于自己手术的目的性变得不可预知~~
能力有限，只能想到这些，可以无视~~