You observe that the senior database administrator always uses the following command when connecting to Recovery Manager （RMAN）， and then starts executing commands to backup the database files： $ rman target / What would be the effect of this command？（）
- ARMAN would use the current operating system location to place the backup.
- BRMAN would use the control file of the target database to maintain the backup.
- CRMAN would use the recovery catalog of the target database to maintain the backup.
- DRMAN would use the control file of the target database to maintain the backup metadata.
- ERMAN would use the recovery catalog of the target database to maintain the backup metadata.