24. 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?
Conflict: 1950 study --> 1 pound per kg increase after 35 yrs of age live longer Vs Latter --> weight gain reduces life
(A) As people age, muscle and bone tissue tends to make up a smaller and smaller proportion of total body weight. --> this tells that body weight decreases with age, but there is nothing mentioned about lifespan, so irrelevant
(B) Individuals who reduce their cholesterol levels by losing weight can thereby also reduce their risk of dying from heart attacks or strokes. --> this gains added point to the latter, but it does not resolve the conflict happening in the passage.
(C) Smokers, who tend to be leaner than nonsmokers, tend to have shorter life spans than nonsmokers. --> Even though smokers are lean, they have less life. Here smokers are just a group of people taken for example. This point is that not only weight gain decreases life. Even if the smokers maintain a normal weight, their life time is less. This gives a valid point that there are lot of other problems for lower lifespan, This builds a good point to resolve the conflicts.
(D) The normal deterioration of the human immune system with age can be slowed down by a reduction in the number of calories consumed. --> This seems like a suggestion, but this statement does not resolve the conflict
(E) Diets that tend to lead to weight gain often contain not only excess fat but also unhealthful concentrations of sugar and sodium. --> Diet is not the topic of discussion, so out.
IMO C