When CONFIGURE CONTROLFILE AUTOBACKUP is set to ON， RMAN automatically performs a control file autobackup in which three situations？（）

AAt the end of every RUN block. 

BAfter every SET CONTROLFILE AUTOBACKUP FORMAT command. 

CAfter every BACKUP or COPY command issued at the RMAN prompt. 

DAt the end of every RUN block if the last command in the block was either BACKUP or COPY. 

EWhenever a BACKUP or COPY command within a RUN block is followed by a command that is neither BACKUP nor COPY. 

FAfter every BACKUP or COPY command within a RUN block that is followed by the CONFIGURE CONTROLFILE AUTOBACKUP FORMAT command.