You are the manager of your company's Web development department. The company network consists of a single Active Directory domain. All client computers run Windows XP Professional. You install Internet Information Services (IIS) on a Windows XP Professional computer. Users in your department use the computer as a test Web server for new content that they develop. You are a member of the Administrators group on the computer, and you use Remote Desktop to perform routine administrative tasks. Several of the virtual directories on the Web server contain confidential company data. You assign NTFS and IIS permissions to the folders and files on the Web server, the default Web site, and the virtual directories, as shown in the following table. You administer the default Web site, which contains a page that lists the Web development projects in progress. The Web page also contains links to each of the virtual directories that are hosted on the Web server. You use Microsoft FrontPage to manage the default Web site. Users in the Web development department control the permissions on their own NTFS folders and virtual directories. Occasionally, users report that the permissions on their folders and virtual directories are reset to the default values. You investigate and discover that this occurs whenever you update the default Web site. What should you do to resolve this problem?（）

• A、In the default Web site's properties, on the Server Extensions tab, select the Manage permissions manually check box. 
• B、Change the NTFS permissions on the default Web site to only Allow - Read and Allow - Write.
• C、Change the IIS permissions on the default Web site to only Read. 
• D、In the properties for each virtual directory, set the Execute Permissions option to Scripts only.