Answer: The correct answer is " D. System Restore ".
Explanation: System Restore is a tool that allows you to return the computer to an earlier state.
It collects the files to be removed and the state that the system was and then you see a loader that is returning to the computer its previous state. Then reboot the system.
In System Restore, the user can create a restore point manually, choose an existing point to restore the system or change the configuration. On the other hand, the restoration itself can be undone later. Old restore points are removed to prevent the hard drive from filling. System Restore supports system files with certain extensions (.dll, .exe, etc.), and saves them for later restoration and use.