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.