【单选题】

{{I}}Questions 14-19 are based on the following conversation. You now have 30 seconds to read the questions 14-19.{{/I}} Why isDavid not sure that he wants to sign up

A、He doesn’t have an instrument of his own.
B．He doesn’t tike to play in small groups.
C．He doesn’t think he can play well enough.
D．He isn’t sure whether he has enough free time.