You create a Microsoft ASP.NET AJAX application by using the Microsoft .NET Framework version 3.5. You attach Microsoft Visual Studio 2008 debugger to the Microsoft Internet Explorer instance to debug the JavaScript code in the AJAX application. You need to ensure that the application displays the details of the client-side object on the debugger console. What should you do？（）

A. Use the Sys.Debug.fail method.
B. Use the Sys.Debug.trace method.
C. Use the Sys.Debug.assert method.
D. Use the Sys.Debug.traceDump method.