TOEFL Listening: ETS-TOEFL听力机经 - HS16PVD456EMC433P$

Why does the professor discuss the Jazz Age? A. To explain a style of music originating in the 1920s. B. To show the importance of consumer goods for young people. C. To compare different lifestyles popular in the 1920s. D. To give an example of how radio influenced young people.