We can infer(推断) who was drunk(喝醉) on Tom's birthday in the bar.

[A] The girl cried because she couldn't find the way home.
B. The squre wasn't noisy because John made himself quiet.
C. John was supposed to meet the doctor at 5 am.

A．

[A] when to stop drinking

B．

[B] the time to drink

C．

[C] something about the bar