You have a computer that runs Windows 7. The computer has System Protection enabled. You need toretain only the last System Protection snapshot of the computer. All other snapshots must be deleted.  Whatshould you do?（）

• A、Run Disk Cleanup for Programs and Features.
• B、Run Disk Cleanup for System Restore and Shadow Copies.
• C、From the System Protection Restore settings, select Turn off System Restore.
• D、From the System Protection Restore settings, select Only restore previous versions of files.