What features were introduced in the IEEE 802.11h amendment in order to uphold regulatory requirements
for 5 GHz operation? (Choose 2)

A.
256-QAM

B.
Distributed Coordination Function (DCF)

C.
Phase Shift Keying (PSK)

D.
Transmit Power Control (TPC)

E.
Radio Resource Management (RRM)

F.
Dynamic Frequency Selection (DFS)