Your company has an Active Directory Domain Services ( AD DS) domain. All servers run Windows Server 2008 R2. You are deploying your first Remote Desktop Services (RDS) server. You install a Remote Desktop Session Host (RD Session Host) server in the environment. You need to install Remote Desktop Services cli ent access licenses (RDS CALs). What should you do first?（）

• A、Run the Install Licenses Wizard.
• B、Run the Manage RDS CALs Wizard.
• C、Add the Remote Desktop Licensing role service.
• D、Add the RD Session Host server to a new group in the Remote Desktop Connection Manager console.