Understanding stakeholder concerns and presenting relevant project case studies and PMO success stories is an effective way to demonstrate tangible value and build trust. PMI-PMOCP advises tailoring communication to address specific doubts and using evidence-based examples to secure buy-in.
Bottom-up relationship-building (option A), testimonials (option C), and sponsor involvement (option D) support engagement but are less direct in addressing expressed doubts.
Reference:PMI Project Management Office Certified Professional (PMI-PMOCP) Examination Content Outline, PMI 2021.PMI-PMOCP Study Guide, Chapter on Stakeholder Management and Strategic Alignment.