【单选题】A: Jack can't stay out with his friends now that school has started. B: ______.
A.
I do believe Jack has made a right decision.
B.
Yes, t agree, grades are more important than parties. His grades dropped.
C.
Yes, that's right. After all, young people should not be too close to their friends.
D.
No, I don't think Jack is right. After all, work is work. Play is play.