The project is nearing the end of stage 2.

PRINCE2 distinguishes between lessons relevant only to the current project and lessons that could benefit the wider organization. While the daily log is suitable for informal recording, PRINCE2 is clear that lessons with wider applicability should be escalated and shared through lessons reports and organizational learning mechanisms.

The scenario explicitly states that the lesson could be used on other projects within the portfolio. PRINCE2 guidance emphasizes that learning should contribute to organizational maturity, not remain isolated within a single project. Therefore, simply recording the lesson in the daily log is insufficient.

Option C is correct because the Sustainability Manager should ensure the lesson is communicated to the portfolio or programme level so it can be applied elsewhere. Options A and B misunderstand the purpose of lessons management, while D invents a status requirement that PRINCE2 does not mandate.