MrMBB
Confused between option A & B. In a fewer books does not explain how profit increased for book stores and reading per capita decrease. Where as B explains the paradox that if theft decreased the profit may increase even if sales has reduced or not increased.
In Critical Reasoning, we have to be super careful about details of what the passage and answer choices say.
In this case, (A) doesn't say just, "fewer books." Rather, it indicates that libraries specifically have purchased fewer books.
So, since libraries lend books and thus multiple people read one library book, the fact that libraries have purchased fewer books would explain how it could be that, even though the average number of books read annually per capita has declined, most bookstores reported increased profits. After all, if people are not able to borrow "contemporary novels" from libraries, if they want to read them, they have to purchase them from bookstores.
Then, in the case of (B), notice that the choice doesn't say, "theft decreased." Rather it says the recent increase in shoplifting has left bookstores "largely unaffected." That information means that theft from bookstores has not increased, in other words, has not changed.
The fact that theft has not changed would not explain the increased profits.
So, (B) is the correct answer.