You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN.   Which two statements are correct in this scenario？（）

• A、You must ensure that the SALES database is mounted or open.
• B、You must restore a backup control file to perform a block media recovery.
• C、You must take the tools01.dbf data file offline before you start a block media recovery.
• D、You must put the database in NOARCHIVELOG mode to perform a block media recovery.
• E、You can perform only a complete media recovery of individual blocks； point-in-time recovery of  individual data blocks is not supported.