单项选择题 You are developing a Windows Presentation Foundation (WPF) application.You need to display HTML content from a Web page on the WPF form. What should you do?（）

单项选择题 You use Microsoft .NET Framework 4 to create a Windows application. You want to use the ClickOnce technology to deploy the application on computers that run Windows Vista with User Access Control (UAC) enabled. You need to ensure that the application can be installed in a secure manner. Which setting should you use in the application manifest?（）

单项选择题 You create a Microsoft Windows Installer file for a Windows Presentation Foundation (WPF) application that requires Microsoft .NET Framework 4. You need to ensure that the installation starts only if .NET Framework 4 is already installed on the computer. What should you do?（）