Your company has a single Active Directory domain. You have 30 database servers that run Windows Server 2008 R2.   The computer accounts for the database servers are stored in an organizational unit （OU） named Data.   The user accounts for the database administrators are stored in an OU named Admin. The database administrators are members of a global group named D_Admins.   You must allow the database administrators to perform administrative tasks on the database servers. You must prevent the database administrators from performing administrative tasks on other servers. What should you do？（）

• A、Deploy a Group Policy to the Data OU.
• B、Deploy a Group Policy to the Admin OU.
• C、Add D_Admins to the Domain Admins global group.
• D、Add D_Admins to the Server Operators built-in local group.