Which Event Triggers the Activation of an Avaya Aura Communication

Multiple Choice

Which event triggers the activation of an Avaya Aura Communication Manager (CM) Survivable server so that it can accept H.323 registrations and/or make IP Trunks active?

A) A broadcast message from the Main CM Server just before it goes in failure
B) The availability of DSP Resources in the CM Survivable Server, by the registration of either a Media Gateway or an Avaya Aura Media Server (AAMS) with that CM Survivable Server
C) The interruption in the RAS keep alive link between CM Main and CM Survivable Servers
D) The first H.323 Registration Request the CM Survivable Server receives from any H.323 Endpoint, after the Endpoint loses contact with the Main CM Server