Your network consists of a single Active Directory forest that contains a root domain and two child domains. All servers run Windows Server 2008 R2.  A corporate policy has the following requirements：   èAll local guest accounts must be renamed and disabled. èAll local administrator accounts must be renamed.   You need to recommend a solution that meets the requirements of the corporate policy. What should you recommend？（）

• A、Implement a Group Policy object（GPO） for each domain.
• B、Implement a Group Policy object（GPO） for the root domain.
• C、Deploy Network Policy and Access Services（NPAS）on all domain controllers in each domain. 
• D、Deploy Active Directory Rights Management Services（AD RMS）on the root domain controllers.