You are the network administrator for your company. The network originally consists of a single Windows NT 4.0 domain. You upgrade the domain to a single Active Directory domain. All network servers now run Windows Server 2003, and all client computers run Windows XP Professional. Your staff provides technical support to the network. They frequently establish Remote Desktop connections with a domain controller named DC1. You hire 25 new support specialists for your staff. You use Csvde.exe to create Active Directory user accounts for all 25. A new support specialist named Paul reports that he cannot establish a Remote Desktop connection with DC1. He receives the message shown in the Logon Message exhibit. (Click the Exhibit button.) You open Gpedit.msc on DC1. You see the display shown in the Security Policy exhibit. (Click the Exhibit button.) You need to ensure that Paul can establish Remote Desktop connections with DC1. What should you do? （）

• A、Direct Paul to establish a VPN connection with DC1 before he starts Remote Desktop Connection.
• B、Direct Paul to set a password for his user account before he starts Remote Desktop Connection.
• C、In the local security policy of DC1, disable the Require strong (Windows 2000 or later) session key setting.
• D、In the local security policy of DC1, enable the Disable machine account password changes setting