Company has a single domain network with Windows 2000, Windows 2003, and Windows
2008 servers. Client computers running Windows XP and Windows Vist
a. All domain controllers are running Windows server 2008.

You need to deploy Active Directory Rights Management System (AD RMS) to secure all
documents, spreadsheets and to provide user authentication.
What do you need to configure, in order to complete the deployment of AD RMS?

A.
Upgrade all client computers to Windows Vista. Install AD RMS on domain controller
Company _DC1

B.
Ensure that all Windows XP computers have the latest service pack and install the RMS
client on all systems. Install AD RMS on domain controller Company _DC1

C.
Upgrade all client computers to Windows Vista. Install AD RMS on Company _SRV5

D.
Ensure that all Windows XP computers have the latest service pack and install the RMS
client on all systems. Install AD RMS on domain controller Company _SRV5

E.
None of the above

Explanation:
http://technet.microsoft.com/en-us/library/dd772753%28v=ws.10%29.aspx
AD RMS Client Requirements
Windows AD RMS Client
Windows 7, all editions
Windows Server 2008 R2, all editions except Core Editions

Windows Vista, all editions
Windows Server 2008, all editions except Core Editions
Windows XP SP3 32-bit Edition
Windows XP SP3 64-bit Edition
Windows Server 2003 with SP1 32-bit Edition
Windows Server 2003 with SP1 64-bit Edition
Windows Server 2003 for Itanium-based systems with SP1
Windows Server 2003 R2 32-bit Edition
Windows Server 2003 R2 64-bit Edition
Windows Server 2003 R2 for Itanium-based systems
Windows Small Business Server 2003 32-bit Edition
Windows Server 2000 SP4 32-bit Edition
http://technet.microsoft.com/en-us/library/dd772659%28v=ws.10%29.aspx
AD RMS Prerequisites
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.
Install the AD RMS server as a member server in the same Active Directory Domain
Services (AD DS) forest as the user accounts that will be using rights-protected content.