During Sprint Planning, the Product Owner presents a Product Backlog item, but the Developers cannot reach consensus on the effort required. What should happen?

Correct answer: The team should discuss concerns and reach a common understanding before estimating

Option B is correct because the Scrum framework values shared understanding over mechanical estimation; when Developers cannot agree on effort, the right response is to discuss the item further, surface assumptions and risks, and build a common understanding before arriving at an estimate. Option A is incorrect because removing the item from consideration is premature and wastes the Product Owner's prioritization work when discussion could resolve the disagreement. Option C is incorrect because the Product Owner is accountable for the what and why of the backlog, not the how-long; having the Product Owner estimate effort violates the Developer's accountability for technical judgments. Option D is incorrect because the Scrum Master's role is to facilitate the process and remove impediments, not to make technical estimates on behalf of the Developers.