19. Choose the sentence that best explains the meaning of the following passage in paragraph 8, “It’s not hard to figureout which part of the music is most difficult to contain.”
(A) It’s not easy to choose the appropriate music in clubs.
(B) It’s easy to see that the sound of the bass is very difficult to control.
(C) It’s difficult to find a way of controlling noise levels.
(D) It’s for sure that music can convey deep meanings that are difficult to understand.