In a project management environment, it's crucial to maintain a positive and collaborative atmosphere. When faced with challenges such as unprofessional behavior or communication issues, the project manager should take corrective actions to address these problems12. A). Confronting the people causing the stress directly with the aim of finding amicable solutions is a proactive approach. It involves open and respectful communication to understand the root cause of the issue and work towards a resolution1. B). Seeking support from the Project Management Office (PMO) can be beneficial as the PMO can provide guidance, resources, and conflict resolution strategies. The PMO can also help enforce organizational policies and standards2. E). Talking to the Human Resources (HR) manager about these concerns is another effective strategy. HR can provide support and advice on how to handle such situations, and they can also intervene if necessary to ensure a respectful and productive work environment3. Avoiding the people causing stress or requesting a transfer (option D) is not a constructive solution as it does not address the root cause of the problem. Discussing possible actions with the project sponsor (option C) could be helpful, but it's not the first line of action as sponsors are typically more involved in high-level project decisions rather than team dynamics4. References: Deep Project Manager, Ganttic, PMHut, Smartsheet