What should the product owner do to resolve this?

When significant architectural flaws are discovered, agile teamsinspect and adapt. According to thePMI Agile Practice Guide (Section 5.6: Retrospectives and Adaptation), the product owner and team shouldcollaboratively reassess priorities and rewrite backlog itemsto reflect the rework needed. This is aligned with agile’sincremental delivery and continuous adaptation.

Mike Griffiths in thePMI-ACP Exam Prep Book (Chapter 6: Adaptive Planning)stresses that rework should be handled through backlog refinement and collaborative planning—not panic or reactive decisions.

Option Cis correct: reassessing the backlog with stakeholders aligns with agile practices.

Option Aabdicates product responsibility.

Option Bis too rigid for agile, unless the risk matrix is already very mature and agile-focused.

Option Dcancels value delivery and is unnecessarily drastic.