Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). The primary group for all users is Domain Users. You share a folder named Data. The shared folder is located on a server named Server1. A user in the Research group named User1 reports that she cannot access files in the Data shared folder. You verify that User1 is not listed in the access control list of the shared folder. You examine the properties of the User1 account. The properties are shown in the exhibit. (Click the Exhibit button.) Other members of the Research group can add and modify files in the Data shared folder. You need to ensure that User1 can access files in the Data shared folder. What should you do? （）

• A、Remove User1 from the IT group.
• B、Assign the Change permission to User1.
• C、Remove User1 from the Domain Users group.
• D、Add User1 to the Server Operators group on Server1.