A project manager is preparing for a lessons learned session at the end of a phase. Which TWO actions will MOST ensure the session is effective?

Invite only the project sponsor and senior management.

Create a safe, blame-free environment where team members can speak openly.

Focus on actionable improvements for future phases/projects rather than just listing what went wrong.

Focus primarily on identifying who was responsible for the errors.

Send a survey instead of holding a meeting to save time.

Wait until the very end of the project to capture all lessons at once.