The project manager should use mentoring and coaching as an activity to help train the stakeholders who need help understanding how to deal with difficult situations. Mentoring and coaching are techniques that involve providing guidance, feedback, and support to individuals or groups to improve their performance, skills, or behavior. Mentoring and coaching can help stakeholders overcome challenges, learn from experiences, and achieve their goals. This option aligns with the PMBOK Guide, 6th edition, which states that "mentoring and coaching are used to help team members and other stakeholders enhance their project management competencies or to address issues and concerns" (p. 349). The other options are not the best choices because they are not activities that directly help train the stakeholders on how to deal with difficult situations. Contract negotiation (option A) is a technique that involves discussing and agreeing on the terms and conditions of a contract between two or more parties. Contract negotiation is not a training activity, but a procurement activity that may involve some stakeholders, such as the buyer and seller. Team assessment (option B) is a technique that involves evaluating the performance, skills, and competencies of the project team members. Team assessment is not a training activity, but a monitoring and controlling activity that may provide feedback and recommendations for improvement. On-the-job training (option D) is a technique that involves providing instruction and practice to individuals or groups while they perform their regular work tasks. On-the-job training is a training activity, but it is not specific to dealing with difficult situations. It is more suitable for developing technical or operational skills. References:
* PMBOK Guide, 6th edition, p. 349 1
* PMBOK Guide, 6th edition, p. 480 2