Which of the following sentences serves as the most effective concluding sentence for this paragraph? 

A) Dickie, a professor emeritus of philosophy at the University of Illinois, has championed the work of philosopher David Hume. 

B) Nearly every major city has museums dedicated to the display of works of fine art such as paintings, sculptures, and performance art. 

C) Other institutions, such as schools and governments, also provide definitions for concepts like education and public value. 

D) This theory forces us to ask: is art truly in the eye of the beholder, or is it in the eye of the artist, the curator, or some critical mass of the consuming public?