【单选题】

{{I}}Questions 17 to 20 are based on the following passage.At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage.{{/I}} What is the main topic of the passage

A、The music ofEdwinElgar.
B．Traditional graduation songs.
C．The music for the graduation.
D．The alternatives toEdwinElgar.