You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment to bind a customer object to several controls in a window. You need to identify the source of the error. What should you do?（）

• A、 Use a Trace object.
• B、 Use a Debug object.
• C、 Use the WPF Visualizer.
• D、 Use a PresentationTraceSources object.