Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3). A user named User1 attempts to log on to a computer named Computer1 and receives the following error message. You need to ensure that User1 can log on to Computer1. What should you do? （）

• A、From the properties of the User1 account, modify the Log On To setting.
• B、From the properties of the User1 account, modify the Logon Hours setting.
• C、From the properties of the Computer1 account, modify the Managed By setting.
• D、From the local security policy of Computer1, modify the Deny log on locally setting.