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 medium r
A、propagation
B、transmission
C、colliding
D、listening
参考答案：
A、propagation
● 参考解析
