You were recently hired by Certkiller .com as a database administrator. You are asked to find out whether the currently functional listener process， named L1， has been password protected or not. You are not familiar with the file system of the new organization. How would you accomplish the task？（）
- A by using the STATUS command of the Listener control utility
- B by using the STATUS L1 command of the Listener control utility
- C by using the SHOW RULES command of the Listener control utility
- D by using the SET PASSWORD command of the Listener control utility
- E by searching for the PASSWORD_LISTENER entry in the listener.ora file