View the Exhibit and examine the output of the query in different times when the following command runs in an RMAN sessions: RMAN> BACKUP DATABASE FILESPERSET 2; The database has seven data files. Why is the %_COMPLETE refreshed to 13.59 in the third output after reaching 88.77?（）

• A、Because the progress is reported for each data file
• B、Because the progress is reported for each backup set
• C、Because other RMAN sessions have issued the same BACKUP command
• D、Because new data files have been added to the database while the RMAN backup is in progress