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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.

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出自：Oracle认证

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