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A long-term health study that followed a group of people who [#permalink]
06 Jan 2004, 08:29
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22. A long-term health study that followed a group of people who were age 35 in 1950 found that those whose weight increased by approximately half a kilogram or one pound per year after the age of 35 tended, on the whole, to live longer than those who maintained the weight they had at age 35. This finding seems at variance with other studies that have associated weight gain with a host of health problems that tend to lower life expectancy.
Which one of the following, if true, most helps to resolve the apparently conflicting findings?
(A) As people age, muscle and bone tissue tends to make up a smaller and smaller proportion of total body weight.
(B) Individuals who reduce their cholesterol levels by losing weight can thereby also reduce their risk of dying from heart attacks or strokes.
(C) Smokers, who tend to be leaner than nonsmokers, tend to have shorter life spans than nonsmokers.
(D) The normal deterioration of the human immune system with age can be slowed down by a reduction in the number of calories consumed.
(E) Diets that tend to lead to weight gain often contain not only excess fat but also unhealthful concentrations of sugar and sodium.
C diverts from generic to a specific example. I think, C provides good explanation to what user said. But, I am sure, this can't come on GMAT. But, ye, for discussions this makes a pretty nice example.
I agree that C could be an analogy to the example at hand. However, smokers' shorter life expectancy could very much be related to problems other than their weight. Thus, C is a plausible explanation at most. D is much much better and more direct _________________
Choices A, D and E have one common base. Not too much weight gain.
People who have health problems may have gained lot of weight. Increasing one pound a year is not such a big deal ( since average life expectancy is not given ). SO it is hard to chose one out of them. D is closest in the sense that it talks about immune system problems.
no doubt D is the best, but
the question here is "..resolve the apparently conflicting findings?"
C provides 1:1 explanation for resolving this conflict. Agree, that the results showed in C is may be b/c of some other cause, but if you dissect in restricted boundaries you will see that C has a point. However much vague it is
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