A customer has the following virtualized environment:

One EMC VNX providing thin LUNs to a VMware ESX v4.0 host
Five VMs running critical OLTP systems supported by one or more databases.
The customer previously experienced some out-of-space conditions due to VMDK
oversubscription. You recommend they upgrade their virtual environment to vSphere v5.0 to
benefit from its VAAI features.
Which VAAI primitive addresses their issue?

A.
Block Zeroing

B.
Stun and Resume

C.
Full Copy

D.
Hardware Assisted Locking