Scenario: A Citrix Engineer is managing a Provisioning Services environment. The day after a new vDisk version is rolled

[answerhappygod]

Scenario: A Citrix Engineer is managing a Provisioning Services environment. The day after a new vDisk version is rolled out to production, multiple users report issues with one of the core applications hosted on the vDisk image. The administrator wants to roll back the new change and allow the target devices to stream from a functioning vDisk as soon as possible.
How can the engineer accomplish this in the least amount of time?

A. Perform a vDisk merge to consolidated differencing disk, then restart the target devices.
B. Copy an older version of the vDisk from the backup storage location, then reassign all the target devices to the imported vDisk and restart them.
C. Revert the vDisk version to Maintenance or Test mode, then restart the target devices.
D. Create a new version of the vDisk and reinstall the application, then restart the target devices.