You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create a Microsoft Windows Communication Foundation (WCF) service that exposes the following  service contract. (Line numbers are included for reference only.)  01 [ServiceContract]  02 public interface IBlogService  03 {  04 [OperationContract]  05 [WebGet(ResponseFormat=WebMessageFormat.Xml)]  06 Rss20FeedFormatter GetBlog（　）;  07 }  You configure the WCF service to use the WebHttpBinding class, and to be exposed at the following URL:  http://www.contoso.com/BlogService  You need to store the result of the GetBlog operation in an XmlDocument variable named xmlBlog in a Web form.  Which code segment should you use? （）

• A、A
• B、B
• C、C
• D、D