Your database is configured in NOARCHIVELOG mode. Due to a media failure， you have lost one of the datafiles belonging to a read-only tablespace. You know that the last backup was performed after the tablespace was made read-only. Which action should you take to restore the missing datafile in the minimum amount of time？（）

• A、 Restore all the datafiles from the backup.
• B、 Restore only the lost datafile from the backup.
• C、 Restore all the datafiles for the lost tablespace from the backup.
• D、 Restore all the datafiles for the lost tablespace and all the SYSTEM and SYSAUX datafiles from the backup.