【单选题】

Speaker A: I'm going to the park with some friends for a barbecue on Sunday. Would you like to join usSpeaker B: ______
A．Why not on Saturday You see, I have an important appointment on Sunday.

B．Thanks, but unfortunately I have to take my sister to the airport on Sunday.
C．That's a wonderful idea. Barbecue is one of my favorites.
D．What preparation do you expect me to do for the barbecue