A storage administrator has presented thin LUNs to a vSphere cluster from an EMC Symmetrix VMAX array. The vSphere administrator then uses those thin LUNs to create VMFS partitions to store virtual disks. When the vSphere administrator creates new virtual machines, a new 100 GB virtual disk was also created.
The virtual disks use 100 GB even though an operating system has not been installed on the guest. Why are the virtual disks using 100 GB of actual array space once they are created and before any data is put on them?

A.
Virtual disks have been formatted �Eagerzeroedthick�

B.
Virtual disks have been formatted �Zeroedthick�

C.
Virtual disks have been formatted �Thin� and zeroed on demand

D.
vmkfstools was not used to format the disks