TOEFL Listening: ETS-TOEFL听力机经 - 6HT53YH1XS4S1F9WP$

According to the lecture, why did Ragtime music become popular in the United States? A. Its melodies were easy to remember. B. Its rhythm was similar to that of early popular music. C. It was written by well-known composers. D. It expresses the spirit of young people.