While troubleshooting a new wireless 802.11 ac network an administrator discovers that several of the older systems cannot connect. Upon investigation the administrator discovers that the older devices only support 802.11 and RC4. The administrator does not want to affect the performance of the newer 802.11 ac devices on the network. Which of the following should the administrator do to accommodate all devices and provide the MOST security?
A. Disable channel bonding to allow the legacy devices and configure WEP fallback
B. Configure the AP in protected mode to utilize WPA2 with CCMP
C. Create a second SSID on the AP which utilizes WPA and TKIP
D. Configure the AP to utilize the 5Gh band only and enable WEP