What are some valid reasons for a wireless network administrator to disable 1 and 2 Mbps data rates

.What are some valid reasons for a wireless network administrator to disable 1 and 2 Mbps data rates on a WLAN controller? Choose 2

A.
To increase throughput in each BSS

B.
To reduce the number of hidden nodes

C.
To force users to use 5 GHz frequencies

D.
To induce load balancing of stations in the ESS

E.
These data rates are not allowed onVoWiFi WLANs

F.
To force the BSS to support short preambles