You work as a database administrator for Supportcenter.cn. You enabled tracing while creating a listener to your database. What additional information is available to you when you enable tracing？（）

• A、Information about each Oracle Net connection.
• B、Information about each entry in theLinstener.orafile
• C、Information about the changed done in the database
• D、Information about the different listeners in your system
• E、Information about all thenondatabasefiles required to operate the database