Which preconfiguration tas

Which preconfiguration task is necessary for VoiceView Express? （）

• AEnsure that the authentication server URL points to Cisco Unity Express. 
• BEnsure that authentication server is owned by the JTAPI user on Cisco Unity Express. 
• CEnsure that all phones point to the authentication server URL owned by Cisco Unity Express. 
• DEnsure that all phones that are owned by the JTAPI user point to the authentication server URL on Cisco Unity Express.