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CR from OG 2017

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Joined: 24 Oct 2016
Posts: 12
CR from OG 2017 [#permalink]

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New post 06 Dec 2016, 03:34
I find that sometimes OG 2017 is not trying to give clear and sensible explanations for answers to CR. I post a question here and was hoping someone please clarity the working of the solution.

The difference in average annual income in favor of employees who have college degrees, compared with those who do not have such degrees, doubled between 1980 and 1990. Some analysts have hypothesized that increased competition between employers for employees with college degrees drove up income for such employees.

Which of the following, if true, most seriously undermines the explanations described above?

(A) During the 1980s a growing percentage of college graduates, unable to find jobs requiring a college degree, took unskilled jobs.

(A) is the right answer, and I got it right. But I wanna know why? I have learned from Kaplan that I want to notice the shift of topic from evidence to conclusion as the shift is always where the assumption lies. In this particular question, the evidence is talking about degrees and income, whereas the conclusion is talking about companies, competition and income. So one of the assumptions of the argument has to do with how degrees relates to competition. However, I could go no further. With this very vague piece of clue, I thought A was right. Could anyone please further explain why A is correct or maybe come up with a more solid way to point to the right answer? Btw, I am also very keen to learn a generic methodology of CR. I have read Powerscore a lot of people around here highly recommend. Well, I was not very impressed. The book is kind of like manhattan SC, lengthy but does not seem to come up with a compact and easy to follow method. Note that I'm by no means saying those two books aren't good! They're really good, but I just wish the authors synthesized all the methods proposed in the books.

Thank you very much!
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CR from OG 2017   [#permalink] 06 Dec 2016, 03:34
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CR from OG 2017

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