You work in a large enterprise environment where provisioning VMs and vApp Templates is a
relatively frequent operation. The provisioning operation is taking longer than you’d like and you
are looking for ways to speed it up across the entire enterprise. What vCloud Director feature will
reduce deployment time for VMs and vApp Templates in your enterprise cloud?

A.
vSphere APIs for Array Integration (VAAI)

B.
Storage vMotion

C.
Fast Provisioning

D.
Storage I/O Control

Explanation:
http://blogs.vmware.com/vsphere/2011/11/linked-clones-part-1-fast-provisioning-invcloud-director-15.html