Which method would you use to recover the data file?

Your database is running in noarchivelog mode. One of the data files belonging to the
system tablespace is corrupted. You notice that all online redo logs have been overwritten
since the last backup. Which method would you use to recover the data file?

A.
Shut down the instance if not already shut down, restore the corrupted data file belonging

to the system tablespace from the last backup, and restart the instance.

B.
Shut down the instance if not already shut down, restore all data files for the entire
database from the last backup, and restart the instance.

C.
Mount the database, restore all data files belonging to the system tablespace from the
last backup, and open the database.

D.
Shut down the instance if not already shut down, restore all data files belonging to the
system tablespace from the last backup, and restart the instance.