Why did Yo-Yo Ma hop of the podium and start jumping up and down during the recital?

A、 He became quite enthusiastic about the recital and wanted to share his excitement with the Audience.
B、 He noticed that the audience had been sitting for a long time and thus encouraged them to Move from their seats.
C、 He could not endure the indifferent reaction from the audience and wanted them to sing Together with him
D、 He did it on purpose and hoped that his unusual performance would leave a deep impression On the audience.