8) If you have a catastrophic (灾难性的) problem with your computer, you can run this application torestore your system to its ________________ state.

You have a computer that runs Windows 7. You manually create a system restore point. You need torestore a copy of a file stored on drive C from two days ago. You must achieve this goal in the minimumamount of time. What should you do?（） A: From Recovery, select System Restore. B: From Backup and Restore, select Restore my files. C: From the command prompt, run Wbadmin get items. D: From the properties of the file, select Previous Versions.