You executed the following command：   RMAN> RECOVER COPY OF DATAFILE ’/u01/app/oracle/oradata/orcl/users01.dbf’；   Which statement regarding the above command is correct？（）  

• A、 The ’/u01/app/oracle/oradata/orcl/users01.dbf’ data file is recovered from the image copy.
• B、 The ’/u01/app/oracle/oradata/orcl/users01.dbf’ data file is recovered from the last incremental backup.
• C、 Image copies of the ’/u01/app/oracle/oradata/orcl/users01.dbf’ data file are updated with all changes up to incremental backup SCN.
• D、 Image copies of the ’/u01/app/oracle/oradata/orcl/users01.dbf’ data file are recovered using the above command if data file recovery fails.