Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command:   RESTORE CONTROLFILE FROM AUTOBACKUP;   Which of the following statements is true?() 
A: The command restores only the missing control file.
B: The command restores all the control files.
C: The command fails because the database is running.
D: This is the correct way to address this problem.
E: This is not the correct way to address this problem.
出自:Oracle认证