Your company has a single Active Directory domain.The domain has servers that run Windows Server 2008 R2. You have a server named NAT1 that functions as a NAT server.You need to ensure that administrators can access a server named RDP1 by using Remote Desktop Protocol (RDP).What should you do？（）

• A、Configure NAT1 to forward port 389 to RDP1.
• B、Configure NAT1 to forward port 1432 to RDP1.
• C、Configure NAT1 to forward port 3339 to RDP1.
• D、Configure NAT1 to forward port 3389 to RDP1.