A network engineer must configure a 5 GHz network to allow for the greatest density of radios possible with the least amount of co-channel interference. Which configuration best fulfills this requirement?

A network engineer must configure a 5 GHz network to allow for the greatest density of radios possible with the least amount of co-channel interference. Which configuration best fulfills this requirement?
A . Set 802.11 h Local Power constraint to 25 dBm.
B . Set DCA to 20 MHz channels and enable Extended UNII-2 channels.
C . Enable Event Driven RRM in 5 GHz with a sensitivity of High, n
D . Configure TPC Power Threshold to -80 dBm and set interference Optimal Mode (TPCv2).

Answer: B