PT5.S3.Q12 - The number of North American children who

Wouldratherbefishing

Hi, I don't understand how the answer is reached. Thanks!

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FixedDice

(A) (1) Too general, (2) we don't know if the said studies mentioned in the stimulus are correct.
(B) Stimulus says nothing about level of physical activity.
(D) Stimulus says nothing about underweight children.
(E) Stimulus says nothing about obesity for different ages.

No matter the number of children, the standard for obesity -- i.e. more body fat than 85% of all children of a certain age (that is to say, 15% of the whole age group) -- is the same per the stimulus. If the number of obese people increases, it stands to reason that their counterpart, non-obese people, are also increasing numerically. That's why (C) is correct.