What parameters make WMM-PS more efficient than legacy 802.11 Power Save mode? Choose 2

A.
WMM-PS identifies incoming VoIP data and delivers it immediately

B.
Use of Data frames as trigger frames instead of Control frames

C.
Queued frames are delivered at scheduled intervals

D.
WMM-PS client devices switch in and out of APSD mode every Beacon

E.
Applications control capacity and latency requirements