The correct answer is C – The Product Owner, since their vision is the basis for the acceptance criteria.
The Product Owner is responsible for defining the product backlog items, including their acceptance criteria. They represent the customer and stakeholders, and ensure that the backlog items deliver business value. During backlog refinement, the PO provides clarity to the team when questions arise.
From the PMI Agile Practice Guide:
“The product owner defines and prioritizes the product backlog and is responsible for ensuring user stories and acceptance criteria are clear and understood by the team.”
(PMI Agile Practice Guide, Section 5.2 – Backlog Refinement)
Mike Griffiths states:
“The product owner is the central point for decisions related to backlog items. Their role is to ensure that requirements and acceptance criteria reflect the desired outcome and stakeholder expectations.”
(Mike Griffiths, PMI-ACP Exam Prep Book, Chapter 3 – Value-Driven Delivery)
Other options are incorrect:
A (Sponsor) is too high-level and not involved in story-level discussions.
B (Scrum Master) facilitates the process, not the requirements.
D (Developer) implements the story but does not define acceptance.
Answer: C
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