og-12 shift works equation

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pradeepkaushal9518: Legendary Member; Posts: 1309; Joined: Wed Mar 17, 2010 11:41 pmFollowed by: 5 members; Thanked: 33 times

by pradeepkaushal9518 » Sun Jul 18, 2010 8:35 pm

plz explain

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Source: Beat The GMAT — Sentence Correction | Sun Jul 18, 2010 8:35 pm

outreach: Legendary Member; Posts: 748; Joined: Sun Jan 31, 2010 7:54 amFollowed by: 3 members; Thanked: 46 times

by outreach » Sun Jul 18, 2010 8:53 pm

a 'and' is required before 'fatigue' for proper structure
b not parallel

'lowered' is redundant in D and E.

c shd be the answer

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viju9162: Master | Next Rank: 500 Posts; Posts: 434; Joined: Mon Jun 11, 2007 9:48 pm; Location: Bangalore; Thanked: 6 times; GMAT Score:600

by viju9162 » Sun Jul 18, 2010 9:57 pm

is it B

"Native of" is used for a individual while "Native to" is used for a large group

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xyh133: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Mon Jun 07, 2010 10:15 pm

by xyh133 » Sun Jul 18, 2010 10:15 pm

IMO C

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gmat_perfect: Legendary Member; Posts: 1083; Joined: Wed Feb 24, 2010 9:38 pmFollowed by: 14 members; Thanked: 127 times

by gmat_perfect » Mon Jul 19, 2010 1:20 am

pradeepkaushal9518 wrote:plz explain

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

The skeleton of the sentence:

Shift-work equations have reduced X, Y, and Z while VerbING.

Key point:

Have reduced X, Y, and Z-here X, Y, and Z are the elements a list of the items that have been reduced by equations. Before the last item of the list we should use "COMMA + AND". Since the last item of the list is "fatigue", we should look for the options where there is AND. A, B, and D are eliminated because they don't have the final AND.
We are between C and E. In the option E, "was lowered" makes the sentence a breakage one. If we say "M has reduced X, Y, and Z was lowered", it loses the parallelism. So, E is out.

Answer is C.

NOTE: While can be used in the middle of the sentence with and without having a comma before it.
I'm walking while you're running = I'm walking during the time you're running
I'm walking, while you're running = I'm walking whereas you're running

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