Which two statements are true regarding undo tablespaces()
- AThe database can have more than one undo tablespace.
- BThe UNDO_TABLESPACE parameter is valid in both automatic andmanualundo management.
- CUndo segments automatically grow and shrink as needed, acting as circular storage buffer for their assigned transactions.
- DAn undotablespaceis automatically created if the UNDO_TABLESPACEparameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up.