Your network consists of a single Active Directory domain. The network contains a Terminal Server that runs Windows Server 2008， and client computers that run Windows Vista. All computers are members of the domain.   You deploy an application by using the TS RemoteApp Manager. The Terminal Servers security layer is set to Negotiate.  You need to ensure that domain users are not prompted for credentials when they access the application. What should you do？（）

• A、On the server， modify the Password Policy settings in the local Group Policy.
• B、On the server， modify the Credential Delegation settings in the local Group Policy.
• C、On all client computers， modify the Password Policy settings in the local Group Policy.
• D、On all client computers， modify the Credential Delegation settings in the local Group Policy.