Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt： RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON； After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）
- A when you change the name of a datafile
- B when you drop a table from the database
- C when you take an export of the database
- D when you back up the database using OS utilities
- E when you issue an ALTER SYSTEM SWITCH LOGFILE statement
- F when you issue a BACKUP command from inside the RMAN run block