Your network contains an Active Directory forest named adatum.com.
You need to create an Active Directory Rights Management Services (AD RMS) licensingonly cluster.
What should you install before you create the AD RMS root cluster?

A.
The Failover Cluster feature

B.
The Active Directory Certificate Services (AD CS) role

C.
Microsoft Exchange Server 2010

D.
Microsoft SharePoint Server 2010

E.
Microsoft SQL Server 2008

Explanation:
http://technet.microsoft.com/en-us/library/cc771789.aspx
Before you install AD RMS
Before you install Active Directory Rights Management Services (AD RMS) on Windows
Server® 2008 R2 for the first time, there are several requirements that must be met:
(…)
In addition to pre-installation requirements for AD RMS, we strongly recommend the
following:
Install the database server that is used to host the AD RMS databases on a separate
computer.
(…)