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by src_saurav » Tue Jul 14, 2015 9:25 pm
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


I came down to B and C . I chose B because it has few words than C. The OA is C. PLease explain the technique .
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by GMATGuruNY » Wed Jul 15, 2015 2:10 am
src_saurav wrote: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
In a list of PARALLEL FORMS serving the SAME FUNCTION, a conjunction must precede the final entry.
Here, "shift-work equations" have reduced three things:
sickness
sleeping on the job
fatigue among shift workers.
Thus, the final entry in the list -- fatigue among shift workers -- must be preceded by a conjunction, as in C and E:
Recently implemented "shift-work equations" have reduced sickness, sleeping on the job, AND fatigue among shift workers.
Eliminate A, B and D.

In E, have reduced and was lowered are redundant.
Eliminate E.

The correct answer is C.
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