正解:D
According to thePMI Agile Practice Guide (Section 7.1 Communication)andPMBOK Guide (6th Edition, Section 13.3 Manage Stakeholder Engagement),transparency with stakeholdersis fundamental in agile environments. Delays or deviations from expected outcomes must bepromptly communicatedto affected stakeholders to adjust expectations and plans.
Mike Griffiths in thePMI-ACP Exam Prep Book (Chapter 4: Stakeholder Engagement)emphasizes that one of the key values in agile isresponding to change over following a plan, and that includes openly discussing risks and delays with impacted parties.
Thus,Option Dis correct: the agile coach shouldproactively engage marketing stakeholdersto inform them about the delay and support revised planning.