Your company has a single Active Directory directory service domain. All servers in your environment run Windows Server 2003. You have a stand-alone server that serves as a Stand-alone root certification authority （CA）. You need to ensure that a specific user can back up the CA and configure the audit parameters on the CA.  What should you do？（）

• A、 Assign the user account to the CA Admin role.
• B、 Add the user account to the local Administrators group.
• C、 Grant the user the Back up files and directories user right.
• D、 Grant the user the Manage auditing and security log user right.