另一道CR题

1.Lists of hospitals have been complied showing which hospitals have patient death rates exceeding the national average.The data hace been ajustied to allow for differeces in the ages for patients.

Each of the following,if ture,provides a good logical groud for hospitals to obeject to interpreting rank on these lists as one of the indices of the quality of hospital care EXCEPT:

A.Rank order might indicate insignificant diferences,rather than large differeces,in numbers of patient deaths.
C.Patients who are very old on admission to a hospital are less likely than younger patients to survive the same types of illnesses or surgical procedures.
为什么选c不选a c难道不是医院反对的理由吗
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就算我底子差
但是老愈说了
在绝望中寻找希望 一切皆有可能