@KevinLin Thank you!!

Wouldn't D be incorrect because the "only when" introduces the necessary condition which would not be our conclusion? Don't we need the necessary clause to be the conclusion ?

I didn't chose A because I felt that it was declaring the only measure of the merit of an artistic work is solely the pleasure it elicits, rather than clarifying the pleasure in addition to the person who creates it. I also still don't understand why E doesn't effectively bridge as a premise to the conclusion?