What should you recommend?

You are designing a recovery solution for file servers that run Windows Server 2008 R2. File servers have the
operating system and settings on volume C and shared data on other volumes.
The recovery solution must meet the following requirements:
Create restorable point-in-time copies of files stored in shared folders on the file servers.
Provide users the ability to compare versions of anopen file.
You need to design a recovery solution that meets the requirements.
What should you recommend? (More than one answer choice may achieve the goal. Select the BEST answer.)

A.
Enable the windows Server Backup feature and schedule a backup of the shared folders on the file servers.

B.
Enable Shadow Copies on all file server volumes.

C.
Enable the Windows Server Backup feature and schedule a backup of the file server system state data.

D.
Enable Shadow Copies on only file server volumes that contain shared folders.

Explanation:
SHADOW COPY OF SHARED FOLDERS
Shadow Copies of Shared Folders provides point-in-time copies of files that are located on shared resources,
such as a file server. With Shadow Copies of SharedFolders, users can view shared files and folders as they
existed at points of time in the past. Accessing previous versions of files, or shadow copies, is useful because
users can:
Recover files that were accidentally deleted. If you accidentally delete a file, you can open a previous
version and copy it to a safe location.
Recover from accidentally overwriting a file. If you accidentally overwrite a file, you can recover a previous
version of the file. (The number of versions depends on how many snapshots you have created.)
Compare versions of a file while working. You can use previous versions when you want to check what has
changed between versions of a file.
http://technet.microsoft.com/en-us/library/cc771305.aspx