by bbirdwell Thu Apr 07, 2011 8:19 pm
You've pointed out the correct flaw -- that 89% of THESE students is not necessarily 89% of the NATIONAL trend. That's what (E) says, which is why (E) is correct.
(A) says something else, and it doesn't go nearly as far. It simply says "the author fails to justify that 89% is an overwhelming majority." Note that this has nothing to do with national vs local or high school students or any of that. It's much simpler. This little fact (89% = majority) does not need justification by the author -- it is totally reasonable to consider 89% an overwhelming majority.
(B) is incorrect because only one conclusion is drawn.
(C) is incorrect because the author does not overlook that possibility, but in fact admits it, saying "IF the rate is high."
(D) is incorrect. There is nothing contradictory about "wanting to finish" and "dropping out."
(E) is totally right, as you pointed out.
Does that clear that up?