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单项选择题You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）

A、 You must use automatic undo management in the database.

B、 You must configure OMF in your database.

C、 You must configure ASM for storing the datafiles.

D、 You must multiplex the online redo log file.

  • A

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