Which statement accurately describes IEEE 802.11 Power Save mode operation in a Basic Service Set that does not support the QoS facility?

A.
Following a period of time in a low power state, client stations wake themselves and automatically poll the access point for traffic using a PS-Poll frame.

B.
When the access point’s buffer is full, the access point wakes all client stations using a PS-Poll frame so that they can receive the data.

C.
Upon receiving traffic for a dozing station, the access point wakes the client station using a PS-Poll frame so that the client station can receive the data.

D.
After waking from a low power state, client stations listen for the next Beacon to determine if sending a PS-Poll frame to the access point is necessary.

E.
After waking at a schedule TBTT, client stations automatically send Null Function frames to the access point with the Power Management bit cleared.