Explanation
According to the PMBOK Guide, the project manager should manage the stakeholder expectations and engagement throughout the project lifecycle. This includes identifying the stakeholder needs and requirements, communicating with them effectively, and resolving any issues or conflicts that may arise. In this case, the project manager has learned from previous experience that the client's turn-around times on documents sent for approval were very slow and well outside of the agreed timelines. This could affect the project schedule, scope, quality, and cost. Therefore, the project manager should work with the client on an acceptable amount of time for document approval, and establish clear and realistic expectations and criteria for the approval process. This way, the project manager can avoid or minimize the potential delays and ensure the project deliverables meet the customer satisfaction. Informing the client that extra resources will be added, updating the project risk register, or informing the client of their responsibility are not effective ways to approach this issue, as they do not address the root cause of the problem or foster a collaborative relationship with the client. References: PMBOK Guide, 7th edition, pages 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, and
35. PMP Question 351.