Assume your situation can be described as follows： x A full backup taken using RMAN is available on disk.  x The current control files were NOT damaged and do not need to be restored.  x All data files are damaged or lost.  x The database is in NOARCHIVELOG mode.  Which RMAN command would be most appropriate to use in line 3 of the following RMAN command set to restore and fully recover your database？（） 1. RMAN> STARTUP MOUNT  2. RMAN> RESTORE DATABASE;  3. RMAN> （）  4. RMAN> ALTER DATABASE OPEN; 

• A、RECOVER DATABASE；
• B、SWITCH DATAFILE ALL；
• C、RESTORE CONTROL FILE；
• D、RECOVER DATABASE USING BACKUP CONTROL FILE；