[ TECHNICAL QUESTION ] Manual reclamation space on thin-provisioned VMFS.

An administrator attempts to manually reclaim space on thin-provisioned VMFS6 volumes but finds that no additional space is being recovered. Which could be causing this?

A. vSphere 6.5 does not support manual UNMAP.
B. The manual UNMAP operation has been moved to thevSphere web client.
C. The VASA version is use is incompatible.
D. UNMAP is automated for VMFS6.