ACMP notes that thechange management lead, often in collaboration with theproject manager, conducts the lessons learned evaluation. This ensures both technical and people-side perspectives are included. While sponsors (C) and broader teams (D) may contribute input, the responsibility lies with those accountable for the initiative's delivery. Option A excludes the change lead, which is incorrect. Therefore, option B is the most accurate.
(Reference: ACMP Standard, Process Group 5 - Close; Activity: Change lead and project manager conduct lessons learned evaluation.)