Who is responsible for ordering the Product Backlog?

Correct answer: The Product Owner

Option C is correct because the Scrum Guide explicitly assigns sole accountability for ordering the Product Backlog to the Product Owner, who balances stakeholder input, business value, risk, and dependencies to sequence items for maximum value delivery. Option A is incorrect because the Scrum Master serves the team by facilitating Scrum events and removing impediments, not by making prioritization decisions on the backlog. Option B is incorrect because the Developers (Development Team) are responsible for creating the Increment and estimating effort, not for deciding the order of business priorities. Option D is incorrect because backlog ordering by committee undermines the single-accountable-person model that Scrum establishes for product decisions.