15. (E)
Question type: Analyze Argument Structure
The point the author makes is that travel writing is not worse, simply different. He mentions that the general public is better traveled in order to support this point.
(E) accurately represents the role played by the statement, and is therefore correct.
(A) represents a misinterpretation of the text.
(B) is outside the score of the argument.
(C) is outside the scope of the argument. We have not been told that readers are disappointed.
(D) is attractive, but we have not been told that travel writing is flourishing more today than it has in the past _ just that it is flourishing.