Bone depletion -- decreases in the thickness, density : GMAT Critical Reasoning (CR)
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# Bone depletion -- decreases in the thickness, density

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Bone depletion -- decreases in the thickness, density [#permalink]

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07 Jun 2014, 06:42
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Bone depletion -- decreases in the thickness, density, and strength of bones -- tends to occur as humans age. The bones of some individuals seem to become thicker, denser, and stronger with regular weight-bearing exercise, such as weight lifting, and with the intake of dietary calcium.

Which of the following can be correctly inferred from the statements above?

A. Individuals who eat sufficient calcium run no risk of bone depletion in old age.

B. Individuals who do not undertake weight-bearing exercise have a high risk of experiencing bone depletion late in life.

C. Weight-lifting and intake of dietary calcium are the most effective methods of avoiding bone depletion.

D. A program of regular weight-bearing exercise and intake of dietary calcium allows some individuals to avoid one of the deleterious effects of aging.

E. Only weight-bearing exercise is necessary to build bone thickness, density, and strength
[Reveal] Spoiler: OA

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Re: Bone depletion -- decreases in the thickness, density [#permalink]

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07 Jun 2014, 09:02
D seems best: A program of regular weight-bearing exercise and intake of dietary calcium allows some individuals to avoid one of the deleterious effects of aging.
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Re: Bone depletion -- decreases in the thickness, density [#permalink]

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11 Jun 2014, 03:55
D seems to answer it best.
B is a contender but removed it due to use to strong words
Quote:
have a high risk of experiencing
.
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Re: Bone depletion -- decreases in the thickness, density [#permalink]

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03 Apr 2015, 01:32
Hi,

Can you please explain why option D is correct?
According to me, we should go for option B because the risk of bone depletion reduces whereas D says we can completely avoid bone depletion which seems to be incorrect.

Thanks in advance
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Re: Bone depletion -- decreases in the thickness, density [#permalink]

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03 Apr 2015, 02:10
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ShristiK wrote:
Hi,

Can you please explain why option D is correct?
According to me, we should go for option B because the risk of bone depletion reduces whereas D says we can completely avoid bone depletion which seems to be incorrect.

Thanks in advance

hi ShristiK,
lets look at the two choices you are talking of...

B. Individuals who do not undertake weight-bearing exercise have a high risk of experiencing bone depletion late in life.
this is too extreme a sentence as it involves all individual. there may be some other means natural, some other dietery supplements etc which can help in reducing ;bone depletion.. so incorrect as the Q stem does not say anything from which this can be inferred.

D. A program of regular weight-bearing exercise and intake of dietary calcium allows some individuals to avoid one of the deleterious effects of aging.
here it says that some of the individuals may be getting benefits and the Q stem does lead to this point..The bones of some individuals seem to become thicker, denser, and stronger with regular weight-bearing exercise, such as weight lifting, and with the intake of dietary calcium.
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Re: Bone depletion -- decreases in the thickness, density [#permalink]

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05 Apr 2015, 20:08
Inference questions - whether in CR or RC - are really asking you "what MUST be true?" When you're looking for a must-be-true, you can avoid any answer choices that are too extreme, as other posters have mentioned.

A. Individuals who eat sufficient calcium run no risk of bone depletion in old age.
"No risk" is way too extreme - we're only told that "some individuals" experience positive change.

B. Individuals who do not undertake weight-bearing exercise have a high risk of experiencing bone depletion late in life.
We can't claim that they have a "high risk", just that they may have a higher risk than some individuals who do. (Note the qualifiers there)

C. Weight-lifting and intake of dietary calcium are the most effective methods of avoiding bone depletion.
We're just told that it can be effective for some people. We have no information comparing it to other methods, so we know nothing about "most."

D. A program of regular weight-bearing exercise and intake of dietary calcium allows some individuals to avoid one of the deleterious effects of aging.
Note the nicely mitigating language here! It's hard to disprove "some."

E. Only weight-bearing exercise is necessary to build bone thickness, density, and strength.
There may be other necessary factors that weren't mentioned in the argument, so we can't claim it's the "only" one.

The answer is D.
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Re: Bone depletion -- decreases in the thickness, density   [#permalink] 05 Apr 2015, 20:08
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# Bone depletion -- decreases in the thickness, density

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