Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on the job, fatigue among shift workers, and have raised production efficiency in various industries.
(A) fatigue among shift workers, and have raised
(B) fatigue among shift workers, and raised
(C) and fatigue among shift workers while raising
(D) lowered fatigue among shift workers, and raised
(E) and fatigue among shift workers was lowered while raising
题目分析：应该是个并列关系作为考点，减少疾病，减少工作打瞌睡，减少疲劳，这三层并列关系和提高生产力进行强对比（减少了三个东西，增加了一个东西），既然前三个东西都是reduce的对象，没有必要再加lower了，干掉DE。A和B都用and而C用while，如果用and就是四重并列了，而根据意思我们知道前三场应该和最后一个提高生产力进行强对比，应该用while更好，选C.
