A. Conduct a general meeting with all stakeholders and review and address a list of activities for each of them

B. Conduct scoping workshops with the project team to create a work breakdown structure (WBS), assign tasks to various entities share this with all stakeholders, and ask the team to complete their tasks as scheduled

C. Breakdown the situation to identify the root causes for the disagreement and then work with each stakeholder and participating entity on their exact roles and responsibilities

D. Create a roles and responsibilities matrix based on the project charter and ask the sponsor to share it with all stakeholders to provide credible authority