21. According to the passage, why do some opponents criticize the casting of Ariel in the live-action The Little Mermaid?

(A)They argue that hiring a colored actress to play Ariel can be an act of plagiarism.

(B)They argue that changing Ariel’s skin color goes against the original story and tradition.

(C)They believe that the role of Ariel should be reserved for actresses from different cultural backgrounds.

(D)They believe that the movie would have been more successful if Ariel were played by an Asian actress.