During a Sprint Retrospective, for what is the Scrum Master responsible?

TheScrum Guidedescribes the Sprint Retrospective as an event where the Scrum Team inspects itself and plans improvements, with the Scrum Master playing a dual role: "The Scrum Master participates as a peer team member in the Sprint Retrospective... and ensures that the event takes place and is positive and productive." Option C captures this—participating as a team member and facilitating when needed. Option A (scribe) is too narrow and not required. Option B (prioritizing) is a team decision, not the Scrum Master’s alone. Option D (reporting to management) violates Scrum’s team autonomy. Thus, C is correct.