Which of the following is a polite action?

1. A.
   Playing the guitar late until 12∶00 at midnight．
2. B.
   Playing basketball in the room of a building．
3. C.
   Talking with friends quite a long time on the phone．
4. D.
   Waiting in line in the doctor's room．

Which of the following is a polite action?

A. Playing the guitar late until 12:00 at midnight．

B. Playing basketball in the room of a building．

C. Talking with friends quite a long time on the phone．

D. Waiting in line in the doctor's room．

Which of the following is a polite action?

A. Playing the guitar late until 12:00 at midnight.

B. Playing basketball in the room of a building.

C. Talking with friends quite a long time on the phone.

D. Waiting in line in the doctor's room.