In a Mission Critical AACC High Availability (HA) Campus Solution

In a Mission Critical AACC High Availability (HA) campus solution, there are two types of switchovers, managed and unmanaged. A managed switchover is one initiated by the administrator or caused by a failure of a monitored Contact Center Manager Server (CCMS) or Communication Control Toolkit (CCT) component. An unmanaged switchover results from a hardware, network, database or power failure. Which three conditions must be satisfied before a switch over can occur? (Choose three.)

A) Switchover is only enabled on the standby server.
B) The active server database and standby server database are synchronized, and the standby server database is shadowing the active server database.
C) The active and standby servers can communicate with the trusted server
D) The active and standby servers have switchover enabled.
E) The active server is running. All the critical CCMS and CCT services are running.