You executed the following query in your database：  FROM V$FLASHBACK_DATABASE_LOG;  What would you determine from the output？（）

• A、the time when the last flashback operation in your database was performed
• B、the time when the first flashback operation in your database was performed
• C、a list of flashback operations performed in your database using SCN and time
• D、the approximate time and the lowest system change number （SCN） to which you can flash back your database