An administrator must decommission a datastore.

Before unmounting the datastore, which three requirements must be fullfilled? (Choose three.)

A.
No virtual machines reside on the datastore.

B.
The datastore is not used for vSphere HA heartbeat.

C.
The size of the datastore must not have been increased in the past.

D.
The datastore must not have any extents.

E.
The datastore must not be part of a datastore cluster.