Your company has an Active Directory Domain Serv ices (AD DS) domain. All client computers run Windows 7. You have a Remote Desktop Session Host (RD Session Host) server. You need to ensure that computer identities are validated before user authentication is performed. What should you do？（）

• A、Configure the Set RD Gateway authentication method Group Policy setting to Use smart card.
• B、Configure the Set RD Gateway authentication method Group Policy setting to Use locally logged - on credentials.
• C、Enable the Configure server authentication for client Group Poli cy setting and then select Do not connect if authentication fails.
• D、Enable the Configure server authentication for client Group Policy setting and then select Always connect, even if authentication fails.