The language is a bit tricky on this one. I will try and give you my interpretation using examples.
First of all, the premises of the argument:
Strong association between households level of education and its library
More years of college and graduate education = More books
Higher the education level = Greater the percentage of books that are not fiction
The keyword in the last premise is "percentage". In my opinion, greater percentage here does not mean that 55% book are non fiction and 45% are fiction. It is actually a comparison between households. It means, for example: If household A has 40 years worth of higher education and household B has 35 years worth of higher education then household A will have more books. Also, household A is expected to have greater percentage of non fiction books compared to
household B. Elaborating further, it means that in household A, if the percentage of non fiction books are 31% then household B is expected to have less than 31% non fiction books, say 29%.
Based on this logic, lets evaluate the answer choices:Choice A
talks about preference of reading. We cannot conclude their preference of reading based on the argument. They may higher percentage of non-fictional books but they may prefer reading fictional books.Choice B
: This choice talks about "numbers". Lets try and break this conclusion: Households with higher education may own a much greater "number" of books but percentage wise, they may own more non-fiction. e.g. - Household A owns a 1000 books out of which only 50 are fiction. Household B with less educational years owns only a 100 books out of which 40 are fiction. So the higher education household has more "number" of fictional books. The premise is still true but the conclusion falls.Choice C
: Again, the argument talks about a greater percentage in comparison to other households
. Not greater percentage within its own inventory. There is no premise to support this.Choice D
: Once again, lets try and break this conclusion: e.g. - Household A has 40 years education and 50 fictional books out of 1000. Household B has 50 years education and 60 fictional books out of 2000. So household B has more fictional books but at the same time, a higher percentage of non-fictional books. Once again, we have managed to hold the premise but not the conclusion. Choice E
: We know that more years of higher education means more books. We also know that they own greater percentage of non fictional books. e.g.- Household A - 40 years - 1000 books - 75% non fiction. Household B - 50 years - 1001 books - >75% non fiction. Even if household B has 1 extra book, we know from the premise that it must have a higher percentage of non fiction books. And higher percentage means more books in this case. So this is the only choice that holds true.
Hope this helps