Under which two conditions is a master elected by vSphere HA? (Choose two.)
A.
When “Reconfigure for vSphere HA” is executed
B.
When the datastore configuration changes
C.
When any cluster is created
D.
When a host is placed into maintenance mode
D is not entirely correct, when the master node is placed in maintenance mode.
http://windowsitpro.com/virtualization/q-what-situations-trigger-fdm-master-election-process-vmware-vsphere-50
The acto of creating a cluster is not enough, HA needs to be enabled like in option A.
So A for Sure, D of all the others are incorrect