Which two statements are true about Oracle Managed Files (OMF)?（）

• A、OMF cannot be used in a database that already has data files created with user-specified directions.
• B、The file system directions that are specified by OMF parameters are created automatically.
• C、OMF can be used with ASM disk groups, as well as with raw devices, for better file management.
• D、OMF automatically creates unique file names for table spaces and control files.
• E、OMF may affect the location of the redo log files and archived log files.