The correct answer is C - Invite the new release manager to the sprint demo and ask for help. Agile encourages stakeholder collaboration and visibility. Sprint reviews (also known as demos) are key opportunities for stakeholders, including release managers, to engage directly with the team and provide feedback. Since the issue is related to environmental instability and the new release manager is a key stakeholder, involving them in the sprint review enables mutual understanding and sets the stage for collaboration.
From PMI Agile Practice Guide:
"Agile teams use the sprint review to present completed work to stakeholders and receive direct feedback. It is also an opportunity to engage stakeholders who can influence the delivery environment." (PMI Agile Practice Guide, Section 4.2 - Stakeholder Engagement) From Mike Griffiths' PMI-ACP Exam Prep Book:
"Agile encourages frequent stakeholder collaboration. Sprint reviews should include key stakeholders who are responsible for operational and release matters to ensure alignment." (Mike Griffiths, Chapter 3 - Value-Driven Delivery) Options A and D are passive approaches and may not lead to effective communication. Option B (attending daily standups) may be helpful but is not the best opportunity for strategic involvement compared to a sprint demo.