Your company has an Active Directory Domain Services (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?（）
- AConfigure the Set RD Gateway authentication method Group Policy setting to Use smart card.
- BConfigure the Set RD Gateway authentication method Group Policy setting to Use locally logged-on credentials.
- CEnable the Configure server authentication for client Group Policy setting and then select Do not connect if authentication fails.
- DEnable the Configure server authentication for client Group Policy setting and then select Always connect, even if authentication fails.