How should the administrator solve the problem without reconfiguring the Guest OS?

A database application that is already leveraging Volumes with a single vDisk is experiencing performance issues.

How should the administrator solve the problem without reconfiguring the Guest OS?
A . Add more Volume Groups with one vDisk each.
B . Enable Jumbo Frames at CVM level.
C . Convert Volume Group to direct attach vDisk.
D . Add more vDisks to the Volume Group

Answer: A