TOEFL Listening: ETS-TOEFL听力机经 - 88K1736A3ZVOY863P$

What does the professor imply about dissonance when he says that it hurts our ears? A. It was not used in comparisons before Artusi's time. B. It helps demonstrate that Artusi's views are still valid today. C. It helps explain why Monteverdi's compositions are no longer popular. D. It can be effective in conveying the emotion that the composer is trying to express.