请教一道GWD的逻辑题

seasons2011

Which of thefollowing most logically completes the passage?
Garnet and RenCo eachprovide health care for their employees. Garnet pays for both testing of its employees’ cholesterol levels andtreatment of high cholesterol.  Thispolicy saves Garnet money, since high cholesterol left untreated for many yearsleads to conditions that require very expensive treatment.  However, RenCo dose not have the samefinancial incentive to adopt such a policy, because ______.
A.   early treatment of high cholesterol dose notentirely eliminate the possibility of a stroke later in life
B.   the mass media regularly feature storiesencouraging people to maintain diets that are low in cholesterol
C.   RenCo has significantly more employees thanGarnet has
D.   RenCo’s employees are unlikely to havehigher cholesterol levels than Garnet’s employees
E.    the average length of time an employee stayswith RenCo is less than it is with Garnet

seasons2011

答案选E，我认为选C。

我的想法是，GARNET的推理是test & treat the high cholesterol 就可以减少many years later, untreated high cholesterol发病的可能性，而且这个病very expensive treatment. 然后Renco没有办法adopt such a policy 的原因是现在没钱，没钱的原因是人太多，连现阶段的test & treat都搞不定了。。。

E也说得通，RENCO反正员工呆的时间短，不去管他们，到了末期需要很多钱治疗的时候已经不在我公司了。

这两个都成立，WHY E BETTER？

seasons2011

打了半天字，我明白了，renco has no incentive!! 关键字这个INCENTIVE，我没看仔细，唉～～～