单选题You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus’ DATABASE filesperset = 2； Which components are included in the backup？（）AOnly the data files.BOnly the data files and the online logs.CThe data files， control files， and the online logs.DThe data files and control files， but not the online logs.
单选题
You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus’ DATABASE filesperset = 2； Which components are included in the backup？（）
A
Only the data files.
B
Only the data files and the online logs.
C
The data files， control files， and the online logs.
D
The data files and control files， but not the online logs.
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