You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You write the following code segment to create a class named MultimediaDownloader that implements the IHttpHandler interface.  Namespace Contoso.Web.UI  Public Class MultimediaDownloader Implements IHttpHandler  ...  End Class  End Namespace  The MultimediaDownloader class performs the following tasks： ?；¤It returns the content of the multimedia files from the Web server ?；¤It processes requests for the files that have the .media file extension The .media file extension is mapped to the aspnet_isapi.dll file in Microsoft IIS 6.0.  You need to configure the MultimediaDownloader class in the Web.config file of the application. Which code fragment should you use？ （）

• A、A
• B、B
• C、C
• D、D