问题：
[单选题] CSMA, although more efficient than ALOHA or slotted ALOHA, still has one glaring inefficiency. If the medium is busy, the station will wait for a random amount of time. When two frames collide, the me
A、propagation
B、transmission
C、colliding
D、listening
参考答案：
A、propagation
● 参考解析
