The wireless team must configure a new voice SSID for optimized roaming across multiple WLCs with Cisco 8821 phones. Which two WLC settings accomplish this goal? (Choose two.)
A. Configure AVC profiles on the SSID.
B. Configure mobility groups between WLCs.
C. Use AVC to tag traffic voice traffic as best effort.
D. Configure AP groups between WLCs.
E. Use Cisco Centralized Key Management for authentication.
