单项选择题 You deploy your companys Internet Web site. You need to deny anonymous access to the Web site, allowing only authenticated users. Which code segment should you use? （）

单项选择题 You create a Web Form that allows users to create a new account. You add a CreateUserWizard control by using the following code segment. You need to ensure that the wizard automatically sends an e-mail message to users when they finish creating their accounts. You add a valid element to the Web.config file. Which code segment should you add to the Page_Load event? （）

单项选择题 You create an intranet Web site for management of project documents. You need to enable all users to browse documents on the site. Only members of the administrators group must be able to upload files. Which code segment of the Web.config file should you use? （）