What facts should you consider when choosing client devices to operate on your WLAN network?

A.
An 802.11 OFDM system is less susceptible to high-power, narrowband interference than an 802.11 HR/DSSS system.

B.
When ERP-OFDM is used by all stations, UNII band devices can communicate with ISM band devices

C.
When HR/DSSS devices are present in an ERP BSS, the use of HR/DSSS will diminish network throughput significantly over a purely OFDM environment.

D.
An ERP-OFDM system supporting only OFDM data rates can interoperate with HR/DSSS devices.