You are the network administrator for your company. The network consists of a single Active Directory domain with two sites named Site1 and Site2. Site1 contains two domain controllers. Site2 contains one domain controller. Each site contains two member servers. All domain controllers are backed up every night. Each of the domain controllers is installed with a similar hardware configuration, which includes a single processor and a single hard disk. You create several user accounts on the domain controller in Site2. The hard disk on that domain controller fails. You install a new hard disk on the domain controller and restore the domain controller from the most recent backup tape. You notice that the new user accounts you created on the domain controller do not appear. The only way that you can restore the user accounts is to re-create them. You need to configure the domain controllers so that the loss of data in Active Directory is minimized during a similar hard disk failure. What should you do?

A.
Configure an existing member server as an additional domain controller in Site2.

B.
Install an additional hard disk in each domain controller. Move the Active Directory log files to the new hard disk.

C.
Install an additional hard disk in each domain controller. Move the Active Directory database file to the new hard disk.

D.
Configure a new site link between Site1 and Site2.