Exam 6210 topic 1 question 24 discussion

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.)