[求助]大全-2-18

Lark Manufacturing Company initiated a voluntary Quality Circles program for machine operators. Independent surveys of employee attitudes indicated that the machine operators participating in the program were less satisfied with their work situations after two years of the program’s existence than they were at the program’s start. Obviously, any workers who participate in a Quality Circles program will, as a result, become less satisfied with their jobs.
Each of the following, if true, would weaken the conclusion drawn above EXCEPT:
(A) The second survey occurred during a period of recession when rumors of cutbacks and layoffs at Lark Manufacturing were plentiful.
(B) The surveys also showed that those Lark machine operators who neither participated in Quality Circles nor knew anyone who did so reported the same degree of lessened satisfaction with their work situations as did the Lark machine operators who participated in Quality Circles.
(C) While participating in Quality Circles at Lark Manufacturing, machine operators exhibited two of the primary indicators of improved job satisfaction: increased productivity and decreased absenteeism.
(D) Several workers at Lark Manufacturing who had participated in Quality Circles while employed at other companies reported that, while participating in Quality Circles in their previous companies, their work satisfaction had increased.
(E) The machine operators who participated in Quality Circles reported that, when the program started, they felt that participation might improve their work situations.

不明白为什么选E，B为什么不对？麻烦解释一下B和E吧。多谢啊

B的意思是实体环境下降不论有无参加计划的人都会感到不满意，他因造成。所以达到weaken的效果。

E是说说明参加的人都没有偏见，取消他因。support

那么请问NN，C为什么是WEAKEN呢？

是指出原文中的surveys of employee attitudes indicated that the machine operators participating in the program were less satisfied with their work situations after two years of the program’s existence than they were at the program’s start.

不属于C的the primary indicators of improved job satisfaction: increased productivity and decreased absenteeism吗？

非常感谢

(C) While participating in Quality Circles at Lark Manufacturing, machine operators exhibited two of the primary indicators of improved job satisfaction: increased productivity and decreased absenteeism.

While Participating说明是刚开始参加program的时候，这时operators的好表现与两年后的不满形成对比，从另一个角度说明，工人刚开始以为program能给他们带来改善，表现得才很积极，与E有异曲同工之妙。所以这个也是个weaken。

attitude和indicator一个主观态度，一个客观指标，当然不一样。