During RF verification, some 5 GHz clients are unable to connect to certain APs, while other 5 GHz clients can connect to all APs. What may prevent some clients from connecting?
A. some clients may not support the UNII-2 Extended band
B. some clients may not support OFDM modulation
C. some clients may not support TPCv2
D. some clients may not support CCXv5
