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；