When specific individuals are disengaged, the project manager should first conduct one-on-one meetings to understand the root causes. Personalized engagement supports psychological safety and trust, especially in remote settings.
According to the PMBOK Guide - Seventh Edition and Agile Practice Guide, team performance and communication are best improved through direct, empathetic interactions.
Option A could add unnecessary complexity without addressing root causes.
Option B may not be feasible for global teams.
Option D is too general when the issue lies with specific members.
References:
PMBOK Guide - Seventh Edition, Team and Communication Performance Domains Agile Practice Guide, Chapter 4 - Working with Distributed Teams
##############################################