A customer has recently implemented a new wireless infrastructure using WLC-5520 at a site directly next to a large commercial airport. Users report that they intermittently lose WI-FI connectivity, and troubleshooting reveals it is due to frequent channel changes. Which two actions fix this issue? (Choose two)
A. Remove UNII-2 and Extended UNII-2 channels from the 5 Ghz channel list
B. Restore the DCA default settings because this automatically avoids channel interference
C. Configure channels on the UNIk2 and the Extended UNII-2 sub-bands of the 5 Ghz band only
D. Enable DFS channels because they are immune to radar interference
E. Disable DFS channels to prevent interference with Doppler radar