(E) says, "Despite widespread acknowledgment of his musical gifts, Wynton Marsalis has come under increasing criticism for what many regard as excessive traditionalism."
It is true that Marsalis has come under lots of criticism despite all of his musical prowess. The problem with this answer choice is that the passage isn't solely concerned with attempting to convince us that Marsalis is now under criticism. Rather, the passage is attempting to examine the possible negative consequences of Marsalis's musical works and ideology. (E) only discusses Marsalis and fails to consider the effects that Marsalis has had on the jazz industry as a whole. Because the passage largely deals with the effects of Marsalis's work, it must be stated as part of the main point. This is why we can get rid of (E).
(D) says, "By emphasizing appreciation of traditional jazz, Wynton Marsalis has unintentionally led major record companies to shun developing new talent in favor of re-releasing vintage jazz recordings."
(D) does a great job in capturing all of what the passage is about. The passage's main point is that even though Marsalis may have had good intentions with his actions, he may have also helped contribute to a halting of jazz music production through his overemphasis of tradition and subsequent shunning of innovation within the genre and development of new jazz artists. (D) captures all of this well, so it's the correct answer choice.
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