You are working on an Oracle Database 10g database. Because of data loss， you decided to perform a Flashback Database operation using the following command：  SQL> FLASHBACK DATABASE TO TIMESTAMP（SYSDATE ？5/24）； Which two statements are true？ （）

• A、 SYSDATE should not be used with TIMESTAMP.
• B、 The database must have multiplexed redo log files.
• C、 The database must be in the MOUNT state to execute the command.
• D、 The database must be opened with the RESETLOGS option after the flashback operation.
• E、 The entire database needs to be restored from the most recent backup before the flashback operation.