15.  Treatment for hypertension forestalls certain medical expenses by preventing strokes and heart disease．Yet any money so saved amounts to only one—fourth of the expenditures required to treat the hypertensive population．Therefore，there is no economic 1ustification for preventive treatment for hypertension．

Which of the following，if true，is most damaging to the conclusion above?

(A)  The many fatal strokes and heart attacks resulting from untreated hypertension cause insignificant medical expenditures but large economic losses of other sorts．

(B)  The cost，per patient，of preventive treatment for hypertension would remain constant   even if such treatment were instituted on a large scale．

(C)  In matters of health care．Economic considerations should ideally not be dominant．

(D)  Effective prevention presupposes early diagnosis，and programs to ensure early diagnosis are costly．

(E)  The net savings in medical resources achieved by some preventive health measures are smaller than the net losses attributable to certain other measures of this kind

答案是A，我选对了，可是仍然觉得题目有些不清楚，请大家帮忙详细解释一下，谢谢

这题我觉得是攻击结论的，推论是一个客观事实，结论认为没有economic 1ustification ，

我猜是经济利益的意思，那要攻击他就是说有经济利益，或者不治高血压能造成经济损失就可

以了，A就是这么说的，而且给出的信息完全相关

题干: 治疗hypertension====>阻止strokes and heart disease====>从而避免了这方面(strokes and heart disease)的开销
          但是, 因为节省的这些开销费用只抵得上治疗hypertension四分之一, 所以防止hypertension的治疗没有经济效应

问: 要否定CONCLUSION

只能用他因来否定CONCLUSION, 就是治疗hypertension在其他方面还能节省大笔钱