Recently implemented "shift-work equations" based : GMAT Sentence Correction (SC)
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# Recently implemented "shift-work equations" based

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Recently implemented "shift-work equations" based [#permalink]

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04 Nov 2009, 20:29
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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

[Reveal] Spoiler:
c

Whats wrong with option B

thanks in advance
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Re: shift-work equations [#permalink]

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04 Nov 2009, 21:20
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TomB 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

[Reveal] Spoiler:
c

Whats wrong with option B

thanks in advance

B is wrong because of wrong parallelism "have reduced....,and raised". Since "shift-based equations" have reduced 1. sickness, 2. sleeping on the job 3. "fatigue among shift workers", the last "fatigue among shift workers" should precede "and".
Only option C is free from these errors.
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Re: shift-work equations [#permalink]

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04 Nov 2009, 21:44
I believe its Option C as well since this option draws parallel for the 3 effects that are reduced and illustrates contrast effect by saying 'while raising..'.
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Re: shift-work equations [#permalink]

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05 Nov 2009, 05:29
right .. contrast is the key here.

thanks
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Re: shift-work equations [#permalink]

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11 Nov 2009, 04:32
A is incorrect because 'have raised' is incorrect. The list of things that have been reduced is in the past tense because the reduction has already taken place. However, the rise in production efficiency is still taking place, so we need "while raising" to communicate that is took place in the past and continues in the present.

TomB 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

[Reveal] Spoiler:
c

Whats wrong with option B

thanks in advance

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Re: shift-work equations [#permalink]

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11 Nov 2009, 04:43
Thank you jallenmorris, it is now clear in my mind.
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Re: shift-work equations [#permalink]

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11 Nov 2009, 04:55
(a) fatigue among shift workers, and have raised
STructure of sentence is "X have reduced A,B,C,and have raised Y"
What is the comma after C doing,it is trying to add one more element
after the list of things which have been reduced..no its not .Rather it is
trying to add one more to the list of HAVEs and hence the proper structure is:
"X have reduced A,B and C,and have raised Y"
Re: shift-work equations   [#permalink] 11 Nov 2009, 04:55
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# Recently implemented "shift-work equations" based

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