What problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose 2)

What problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose 2)
A . Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.
B . WLAN client stations can experience the hidden node problem when located near each other within the same cell.
C . The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.
D . Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.
E . APs operating in the 2.4 GHz band would prevent microwave ovens and analog video cameras from functioning.

Answer: AD