What is the role of lessons learned in continual improvement?

• A.They provide insights from past experiences (incidents, audits, exercises) that inform improvements to prevent recurrence and enhance practices
• B.They are captured for incident response alone (major incidents, breaches) and filed with the incident record, outside the improvement process
• C.They are an optional record (kept at the ISMS manager's discretion), and fall outside the documented information clause 7.5 expects
• D.They are written up after major events (breaches, regulator inquiries) and sent to the certification body, rather than fed into improvement