The word "get-off" (Line 2, Para. 3) could be replaced by ______.

A．The similarities between jazz and the other dance music.
B．The popularity of jazz.
C．The characteristics of jazz.
D．How the jazz musicians display their individuality.

A．A group of musicians create polyphony.
B．A player creates the musical phrase according to his or her inspiration,
C．A musician creates the solo during the playing course.
D．A musician modifies published popular songs.