At the sprint review the team complained the scrum master failed to remove impediments (scheduling external meetings, securing a room, etc.), causing delays. What should the project manager do?

The correct answer is to determine and agree when a situation qualifies as an impediment to be handled by the Scrum Master. This approach fosters clarity and shared understanding within the team regarding the Scrum Master's responsibilities. The Scrum Master's role is to remove impediments that hinder the team's progress, but the team also has a responsibility to be self-organizing. By defining what constitutes an impediment requiring the Scrum Master's intervention, the team can operate more effectively and independently. Requesting an additional resource is premature without understanding the root cause or scope of the issue. Asking the team to prioritize impediments is part of the solution, but it doesn't address the underlying confusion about the Scrum Master's role. Pushing back and stating that a self-organized team should address all problems is unhelpful and dismisses the Scrum Master's core responsibility to remove impediments.