Certkiller.com is currently using a performance counter named HitCounter. You are required to increment each time a user accesses the UI classes within the application. To do this, you start by creating performance counters using the following code: GRAFIK - wird nicht für Antwort ben?tigt !!! You have to adjust the HitCounter performance counter when a hit occurs. What should you do?（）

• A、
• B、
• C、
• D、