An administrator has deployed a vSphere 5 implementation. Due to security reasons the system state of a virtual machine must be reverted on a regular basis what feature will meet this requirement?

A.
Create the virtual machine using Independent-Persistent disks

B.
Create a Scheduled Task using the Delete All Snapshots option according to security requirements

C.
Create the virtual machine using Independent-Nonpersistent disks

D.
Create a Scheduled Task using the Delete Snapshot option to delete the most recent snapshot according to security requirements.

Explanation:
If you delete snapshot then you cannot revert VM deleting will merge snapshot to VM so it will be permanent. So B and D are wrong.
C is OK, but it will not revert VM on a regular basis just when VM is restarted.