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Parallelism indicator 'and' is used here, we have to look for an answer which adheres to the parallelism concept.

A. to eliminate X, combined with Y and to encourage Z - 'combined with' is not in sync
B. to eliminate X and a combination of Y - Not Correct. Should be something like "to X and to Y"
C. if X and Y and to encourage Z - Again Incorrect for the same reason.

D. to eliminate X and, <appositive phrase>, to encourage Y, <Noun modifier> - Correct use of Parallelism 'to X and to Y'. Let's keep this option choice.

E. if before bone loss develops, residents combine balance training and encourage an increase of bone density with diet and weight-bearing exercise while residential environments are eliminated of hazards - Incorrect as meaning is illogical. . 'residential environments are eliminated of hazards'...wait how or by whom?

Correct Option - D
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Loved solving this, typical GMAT :D

IMO D

The best strategy for preventing hip fractures among residents of geriatric homes is to eliminate hazards from the residential environment before bone loss develops, combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise.

Rules to seek out for :
1.Parallelism 2. Parallelism!

Look at the skeleton of the sentence:
The best strategy for preventing A is to .... combined with B and to...through C and D, before E developes.

Option D exactly matches this skeleton with the intended meaning.

A. to eliminate hazards from the residential environment before bone loss develops, combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise

B. to eliminate hazards from the residential environment and a combination of balance training to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops

C. if hazards are eliminated from the residential environment and combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops

D. to eliminate hazards from the residential environment and, combined with balance training, to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops

E. if before bone loss develops, residents combine balance training and encourage an increase of bone density with diet and weight-bearing exercise while residential environments are eliminated of hazards
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A. to eliminate hazards from the residential environment before bone loss develops, combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise -> "balance training" is not parallel to "to encourage "

B. to eliminate hazards from the residential environment and a combination of balance training to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops-> "combination of balance training" is not parallel to "to eliminate hazards"

C. if hazards are eliminated from the residential environment and combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops -> "The best strategy... is if..." is incorrect.

D. to eliminate hazards from the residential environment and, combined with balance training, to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops -> Correct

E. if before bone loss develops, residents combine balance training and encourage an increase of bone density with diet and weight-bearing exercise while residential environments are eliminated of hazards -> "The best strategy... is if..." is incorrect.
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The best strategy for preventing hip fractures among residents of geriatric homes is to eliminate hazards from the residential environment before bone loss develops, combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise.

A. to eliminate hazards from the residential environment before bone loss develops, combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise Incorrect

parallelism error - ........to eliminate, combined ........and to encourage............

B. to eliminate hazards from the residential environment and a combination of balance training to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops Incorrect


meaning change and parallelism error- ..............to eliminate ..................and a combination of

C. if hazards are eliminated from the residential environment and combined with balance training and to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops Incorrect

wrong - .............is if.....

D. to eliminate hazards from the residential environment and, combined with balance training, to encourage an increase of bone density through diet and weight-bearing exercise, before bone loss develops Correct

E. if before bone loss develops, residents combine balance training and encourage an increase of bone density with diet and weight-bearing exercise while residential environments are eliminated of hazards Incorrect

wrong - .........is if .............
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The official explanation is here.
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I have a confusion in this question.

The question is taking about One strategy while D shows two strategies.

For the very same reason I was not choosing D.
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milanrajb
I have a confusion in this question.

The question is taking about One strategy while D shows two strategies.

For the very same reason I was not choosing D.

Hello milanrajb,

We hope this finds you well.

To answer your query, the intended meaning of this sentence is that the strategy in question consists of two actions - eliminating hazards from the residential environment and encouraging an increase of bone density through diet and weight-bearing exercise before bone loss develops.

We hope this helps.
All the best!
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