[单项选择]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?（）
A.  Add a FlowDocumentReader control to the design surface. Then create a FlowDocument control.
B.  Add a DocumentViewer control to the design surface. Then create a FixedDocument control.
C.  Add a WebBrowser control to the design surface. Then use the Navigate method to navigate the URI object.
D.  Add a ContentControl control to the design surface. Then reference a WebClient object to return an HTML string.

[单项选择] You are developing a Windows Presentation Foundation (WPF) application The application is for commercial use and requires a valid license key to be entered. You create a project type of Class Library code to validate license keys You need to ensure that the user enters a valid license key during installation of the software. Which deployment should reference the class library?（）
A.  Click Once
B.  Setup Project
C.  XBAP
D.  XCopy

[多项选择]You are developing a Windows Communication Foundation (WCF) service. You write a method named Submit that accepts messages of the type System.ServiceModel.Channels.Message. You need to process the body of the incoming messages multiple times in the method. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)（）
A. Use the GetBody method of the Message class to read the content of the messages.
B. Use the CreateBufferedCopy method of the Message class to load the messages into memory.
C. Use the WriteBodyContents method of the BodyWriter class to make a copy of the messages.
D. Use the CreateMessage method of the MessageBuffer class to make a copy of the messages.