Hi,
here is a question. answer is 3. Now although i find answer 3 correct too, i argue in favor of 5. my point is:
there are 2 types of children, ones who have talent for music and ones who don't right? let's call them category I and II. children who belong to first category receive musical education and other ones not. in the end of the para, author makes a point that some of the children who belong to second category have potential chances of becoming proficient musician later in their life.

Now; how do you think it's possible for - i quote - "some" of the children (who belong to II category) to become proficient later? Only when all children get musical education right? because there is no other way to find whether those exceptional children (in II category) are there. hence if we give education to all children in II category, some of those may become musicians later. hence answer 5.

Please advise.

QUESTION__________________________________
Educator: Like many other difficult pursuits, music requires intense study and practice from an early age in order for one to become proficient. But many school music programs encourage only children who demonstrate early aptitude to continue studying music, while children who do not appear especially musical are directed towards other activities. Having learned to think of themselves as musically inept, these children do not devote any time to music, and thus some of them deprive themselves of the opportunity to develop latent but potentially significant musical talent.

The educator's statements, if true, would best support which of the following conclusions?
1)Music education should not devote special attention to talented students.
2)Everyone has the potential to learn music.
3)The number of proficient adult musicians is less than it could be.
4)Children are particularly sensitive to criticism from adults.
5)All children should study music.

Good explanation here: cr-question-from-manhattan-cat-please-explain-the-answer-t1754.html

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Jamie Nelson
ManhattanGMAT Instructor