单项选择题

A.control fileB.password fileC.listener controller file……

You want the user APP_DBA to administer the Oracle database from a remote machine. APP_DBA is granted the SYSDBA privilege to perform administrative tasks on the database. Which file is used by the Oracle database server to authenticate APP_DBA？（）

A.control file
B.password file
C.listener controller file
D.control file and password file

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