Which three statements are true about database storage structures?
A.
A data file can span across tablespaces.
B.
An extent contains one or more segments.
C.
Tablespaces contain one or more data files.
D.
Data objects are stored as segments in tablespaces.
E.
Segments can span across data files within a tablespace.
Explanation:
https://docs.oracle.com/cd/E11882_01/server.112/e40540/physical.htm#CNCPT1109