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单项选择题 You are working on an instance started using the SPFILE. You want to move the Flash Recovery Areaof your database to a new location. You want the Flashback log files to be stored in the new location. Given below are the steps to accomplish the task in random order： 1）Shut down the instance. 2）Change the value of the DB_RECOVERY_FILE_DEST initialization parameter to a new value. 3）Execute the ALTER DATABASE FLASHBACK OFF command. 4）Start up the instance and mount the database. 5）Execute the ALTER DATABASE FLASHBACKON command. 6）Open the database. Select the correct order in which these tasks need to be performed. （）: A、2，1，4，3，5，6; B、1，4，3，2，6，5; C、1，4，2，6，3，5; D、3，2，1，4，5，6

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