S1:Well, all the food is delicious. I like them very much. By the way,I have an appointment at 7 p.m. I must go now.S2:I'm very glad you came.Q: Why must the first speaker go now?
选项：

A:Because the ship will leave.
B:Because he has an appointment.
C: Because he is drunk.
D: Because the food is tasteless.