You have a computer that runs Windows 7. The computer has two volumes named volume C and volume D. You create a document on volume D. You manually create a restore point and modify the document. You view the properties of the document as shown in the exhibit.
(Refer to the Exhibit.)

You need to ensure that you can restore the current version of the document if the document is modified. What should you do first?

A.
Run Disk Cleanup on volume D.

B.
Enable auditing on the document.

C.
Turn on System Protection for volume D.

D.
Start the Volume Shadow Copy Service (VSS).