Briefing ISEB Knowledge

Which of the following would be examined by a major problem review?

Which of the following would be examined by a major problem review?
Things that were done correctly
Things that were done incorrectly
How to prevent recurrence
What could be done better in the future

A.
1 only

B.
2 and 3 only

C.
1, 2 and 4 only

D.
All of the above