单选题
AYou must use Oracle predefined names to identify raw partitions that will hold OMF structures.
BYou must define directories for two online redo log groups and three copies of the control file.
CIf your CREATE DATABASE command fails, any OMF database files that have already been created will be dropped automatically.
DYou must use only OMF data files when adding new tablespaces or data files to your database in the future.
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