What happened?

A vSphere Administrator sees the alarm:

vSphere HA virtual machine failed to failover

This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. The virtual machines guest operating systems never reported a power event.

What happened?
A . The virtual machines were vMotioned off of the ESXi host.
B . The ESXi host is still running but has disconnected from the network.
C . The ESXi host failed and vSphere HA successfully failed over the virtual machines.
D . The previous virtual machine cloning operations failed to complete.

Answer: C