You work as an application developer at Certkiller .com. You are preparing to run diagnostics on an application by using TraceSwitch objects.  You start by adding the following elements to the application configuration file： You then test the TraceSwitch settings by using the code displayed in the exhibit below：  What represents the output that will be displayed by this test？（）

• A、A
• B、B
• C、C
• D、D