You need to configure files history on a client system

You are employed as an administrator at contoso.com.
The network consists of a single Active Directory Domain Services (AD DS) domain, named contoso.com.
All workstations on the contoso.com network have Windows 8 installed.
You need to configure files history on a client system.
You notice that the free storage space on the selected drive is low, but you do not have a spare driveto replace
it.
What should you do ?

A.
Configure the save copies of files setting to back up files once a day.

B.
Configure Size of offline cache setting to 2%

C.
Keep saved versions setting to be 1 month

D.
Keep saved versions setting until space is needed