请教一道prep逻辑题，很经典！大家共同提高！

chuancheng

Two companies, G and T, each pay Salcor to provide health insurance for their employees. Because early treatment of high cholesterol can prevent strokes that would otherwise occur several years later, Salcor encourages G employees to have their cholesterol levels tested and to obtain early treatment for high cholesterol. R employees generally remain with R only for a few years, however. Therefore, Salcor lacks any financial incentive to provide similar encouragement to R empoyees.

weaken?

A. Early treatment of high cholesterol does not eliminate the possibility of a stroke later in life

B. People ofter obtain early treatment for high cholesterol on their own.

C. G hires a significant number of former employees of R

D. R and G have appoximately the same number of employees.

E. R employees are not, on average, significantly younger than G employees

答案是C

这个题的逻辑简图是啥啊~怎么会有这么个答案！

扣请版主出山！

owenwei

"R employees generally remain with R only for a few years, however. "这是论证的主要依据。(隐含假设：离职了就和医保公司彻底没关系了）

C. G hires a significant number of former employees of R 削弱依据，因为r的人去了g，对医保公司来说是一样的，还得负责（削弱)

chuancheng

我认为G一直是有医保的，不管从哪里来的人都有；而R的人呆的时间不长，如果选那个答案，就是R在为G负责，凭什么？

我别在这个地方