oracle ocp 19c考题8，科目082考试题-logical and physical database structures

Which three statements are true concerning logical and physical database structures? (Choose three.)A. All tablespaces may have one or more data filesB. The extents of a segment must always reside in the same datafileC. A smallfile tablespace might be bigger than a bigfile tablespaceD. A segment can span multiple data files in some tablespacesE. A segment’s blocks can be of different sizesF. A segment might have only one extentG. Segments can span multiple tablespsacesSource：cuug