When CONFIGURE CONTROLFILE AUTOBACKUP is set to ON， RMAN automatically performs a control file autobackup in which three situations？（）
At the end of every RUN block.
B. After every SET CONTROLFILE AUTOBACKUP FORMAT command.
C. After every BACKUP or COPY command issued at the RMAN prompt.
D. At the end of every RUN block if the last command in the block was either BACKUP or COP
E. Whenever a BACKUP or COPY command within a RUN block is followed by a command that is neither BACKUP nor COP
F. After every BACKUP or COPY command within a RUN block that is followed by the CONFIGURE CONTROLFILE AUTOBACKUP FORMAT command.
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