Story point estimation in agile is a collaborative team activity, and consensus is critical. Techniques like Planning Poker are designed to reveal differences in understanding. According to the PMI Agile Practice Guide (Section 5.2 Estimating Techniques) and Mike Griffiths (Chapter 6: Adaptive Planning), when there ' s a discrepancy in estimates, it is essential to discuss and understand the rationale behind differing views.
Option C is correct: the team should discuss and clarify to reach a shared understanding.
Option A ignores potential misunderstandings.
Option B unnecessarily delays estimation.
Option D is incorrect—the team, not the customer, estimates the effort.
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