Which of the following is NOT true concerning “parallel session”？

A.Parallel session is smaller-scale meetings which take place at the same time in different rooms.

B.Young scholars usually present their papers at the parallel session.

C.Parallel session may involve more detailed discussion between authors and participants.

D.Parallel session doesn’t allow walk-ins and walk-outs.

正確答案：Parallel session doesn’t allow walk-ins and walk-outs.