You work as a database administrator for Certkiller .com. You decided to manage client and server connections using Local Naming method in Certkiller .com. When you try to connect to the database you get the following error： ERROR：  ORA-12154：TNS：couldnot resolve service name  Which network configuration files would you look into to resolve this error？（）

• A、snmp.ora
• B、names.ora
• C、spfile.ora
• D、sqlnet.ora
• E、listener.ora
• F、tnsnames.ora