What must the administrator use to separate those frames in the wireless network?

The network administrator has used VLANs to separate VoIP frames from data frames in the wired
network. What must the administrator use to separate those frames in the wireless network?

A.
multiple SSIDs

B.
multiple authentications

C.
multiple WEP or WPA keys

D.
multiple channels

E.
multiple 802.11 radios (a, b, g, n)