Your network consists of a single Active Directory domain. All network servers run Windows Server 2003 Service Pack 2 (SP2). The domain includes two global groups named ResearchManagers and ResearchUsers. You create a share named ResearchData. On the ResearchData share, you assign the Change permission to ResearchUsers and ResearchManagers. The ResearchData folder contains a file named ResearchConfidential.rtf. The permissions for ResearchConfidential.rtf are configured as shown in the exhibit. (Click the Exhibit button.) Members of ResearchUsers report that when they try to open ResearchConfidential.rtf, they receive an access denied message. Users report that they can add and modify other files in ResearchData. You need to ensure that ResearchUsers members can open ResearchConfidential.rtf. The solution must prevent ResearchUsers members from modifying the file. What should you do? （）

• A、On ResearchData, enable permission inheritance.
• B、On ResearchConfidential.rtf, enable permission inheritance.
• C、On ResearchData, assign the Read permission to ResearchUsers.
• D、On ResearchConfidential.rtf, assign the Read permission to ResearchUsers.