Active Directory Rights Management Services （AD RMS） is deployed on your network.     You need to configure AD RMS to use Kerberos authentication.   Which two actions should you perform（）

• A、Register a service principal name （SPN） for AD RMS.
• B、Register a service connection point （SCP） for AD RMS.
• C、Configure the identity setting of the _DRMSAppPool1 application pool.
• D、Configure the useAppPoolCredentials attribute in the Internet Information Services （IIS） metabase.