You work as an application developer at Certkiller .com. You have been asked to profile a business application that can be accessible using the Event Log API. You have started by adding the following code to create a custom event log：  if （EventLog.SourceExists （"Application1"））  EventLog.DeleteEventSource （"Application1"）；  //Create new event log  EventLog.CreateEventSource （"Application1"， "Profile"）；  You need to write an event to the Application1 event log. What code must you use？（）

• A、A
• B、B
• C、C
• D、D