Which two statements are true regarding Oracle Data Pump（）

• A、EXPDP and IMPDP are the client components of Oracle Data Pump.
• B、DBMS_DATAPUMP PL/SQL packages can be used independently of the Data Pump clients.
• C、Oracle Data Pump export and import operations can be performed only by users with the SYSDBA privilege.
• D、Oracle Data Pump imports can be done from the export files generated in the export utility of previous versions.
• E、EXPDP and IMPDP use the procedures provided by DBMS_METADATA to execute export and import commands.