[分享]讨论lsat !!!!

lilyhuang

Sec 4 ( III)
12. 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 year.

If the finding reported above is correct, it can be properly concluded that
(A) when four major studies all produce similar results, those studies must be accuraate.
(B) North American children have been prograssively less physically active over the past 15 years.
(C) The number of North American children who are not obese increased over the past 15 year.
(D) Over the past 15 years, the number of North American children who are underweight has declined.
(E) The incidence of obosity in North American children tends to increase as the children grow older.

A，B，D，E有很明显的错误. 无论如何不明白C为什么是对的, 脑子好象糊涂了. Can you give me some tips? Many thanks.

lilyhuang

Thank u.

lilyhuang

"that is who have more body fat than do 85 percent of North American children their age"
D) Over the past 15 years, the number of North American children who are underweight has declined.

Sorry, i didn't carefully check the answer in a hurry yesterday.  But in D choice, it means that the number of...... has declined, not"increased".  On the other hand, the children described in the paragraph should be divided into three categories: children who are obese, children who are at normal weight, children who are underweight. I really don't know how to reason to get D choice???

lilyhuang

to greandgmat:

Sorry, i made a mistake.  I had thought that the right answer is D and don't really know how i checked the answer that day!!!  Anyway, thank u very much! Hope that it didn't take much of ur time.