狒狒114

114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age---is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate

(B) North American children have been progressively less physically active over the past 15 years

(C) the number of North American children who are not obese increased over the past 15 years

(D) over the past 15 years, the number of North American children who are underweight has declined

(E) the incidence of obesity in North American children tends to increase as the children grow older

谁能解释下 为什么选C？？

首先需认清obese的定义，即比85%的同龄人都要胖，因此obese人的比例是固定的15%。

下面就是算数了，obese占全体15% & obese人在增加----〉全体人增加-----〉not obese也增加

仅供参考。