A project is ending and the final deliverables have been accepted by the customer.

According to the PMBOK Guide, the project manager should identify the key stakeholders and their needs and expectations at the beginning of the project and throughout the project life cycle1. The project manager should also involve the key stakeholders in the project agreement discussions, as it helps to establish a common understanding of the project objectives, scope, deliverables, and acceptance criteria2. Therefore, the best option is to identify key stakeholders and include all of them in project agreement discussions. Option A is incorrect because distributing a detailed quality management plan to the key stakeholders may not ensure that they agree with the project objectives or the quality standards. Option B is incorrect because including the final report during the closing phase may not address the issue of stakeholder dissatisfaction or misalignment, as it may be too late to make any changes or adjustments. Option D is incorrect because performing project reporting according to the communications management plan may not guarantee that the stakeholders are aware of or satisfied with the project outcomes, as it may not reflect their feedback or concerns. References: 1: PMBOK Guide, 6th edition, section 13.1.3.1, p. 513 2: PMBOK Guide, 6th edition, section 4.1.3.1, p. 89