HOTSPOT
You are developing an application that includes a Windows Communication Foundation (WCF)
service. The service includes a custom TraceSource object named ts and a method named DoWork.
The application must meet the following requirements:
Collect trace information when the DoWork() method executes.
Group all traces for a single execution of the DoWork() method as an activity that can be viewed in
the WCF Service Trace Viewer Tool.
You need to ensure that the application meets the requirements.
How should you complete the relevant code? (To answer, select the correct code segment from each
drop-down list in the answer area.)

Answer:

Explanation: