单选题On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30am. Which option must you use to check whether a flashback operation can recover the database to the specified time?（）ACheck the alert log fileBQuery the V$FLASHBACK_DATABASE_LOG viewCQuery the V$RECOVERY_FILE_DEST_SIZE viewDQuery the V$FLASHBACK_DATABASE_STAT viewECheck the value assigned for the UNDO_RETENTION parameter
单选题
On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30am. Which option must you use to check whether a flashback operation can recover the database to the specified time?（）
A
Check the alert log file
B
Query the V$FLASHBACK_DATABASE_LOG view
C
Query the V$RECOVERY_FILE_DEST_SIZE view
D
Query the V$FLASHBACK_DATABASE_STAT view
E
Check the value assigned for the UNDO_RETENTION parameter
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On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? （）A. Check the alert log fileB. Query the V$FLASHBACK_DATABASE_LOG viewC. Query the V$RECOVERY_FILE_DEST_SIZE viewD.Query the V$FLASHBACK_DATABASE_STAT viewE. Check the value assigned for the UNDO_RETENTION parameter
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