Q17. Which two statements are true about the configuration and use of UNDO_RETENTION with no GUATANTEED RETENTION?

Q17. Which two statements are true about the configuration and use of UNDO_RETENTION with no GUATANTEED RETENTION?

• A) UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unexpired UNDO.
• B) UNDO_RETENTION specifies how long all types of UNDO are retained.
• C) Unexpired UNDO is always retained.
• D) Active UNDO is always retained.
• E) UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.