Which of the following is a valid object to add an extent to?

A.
an available unused storage volume

B.
an existing VMFS or NFS datastore

C.
an existing VMFS datastore

D.
an existing NFS datastore

Explanation:
What’s New in VMware vSphere. vStorage VMFS Volume Grow – vCenter Server allows dynamic expansion of a VMFS volume extent to add capacity to an existing datastore. VMFS Volume Grow is a new method for expanding a datastore without disrupting running virtual machines. After a LUN that backs that datastore is expanded through an array management utility, the administrator can use VMFS Volume Grow to expand the VMFS extent on the expanded LUN.