Stakeholder engagement is a critical function of a project manager, especially when there is disagreement over decisions. The best course of action is to clarify the rationale behind the selection and use data-driven reasoning to influence the dissenting teams toward consensus.
According to the PMBOK Guide - Seventh Edition (Stakeholder and Communication Performance Domains), the project manager must ensure that stakeholders understand the process and are aligned with outcomes. Engaging in respectful discussions and influencing team members through facts and process transparency supports long-term collaboration and buy-in.
Option A escalates prematurely.
Option B is authoritarian and damages trust.
Option C neglects stakeholder engagement.
References:
PMBOK Guide - Seventh Edition, Stakeholder Engagement and Decision-Making Principles PMI Influence Without Authority Toolkit
##############################################