以下说法正确的是?

以下说法正确的是?

A.C-Plane Latency shows the idle to active transition time the end user may experience to setup a service.

B.U-Plane shows the PING round trip time in the end to end communication

C.Peak DL Cell Throughput shows the average throughput the cell can reach in downlink, on the application layer.

D.Attach Time shows the connection time for an end user to attach to the network, during which the activation of a default bearer is performe