The project manager should use Monitor Communications techniques to ensure that the communication needs of the project and its stakeholders are met. This involves collecting and analyzing feedback from stakeholders, reviewing the effectiveness and quality of the communication activities, and identifying and resolving communication issues. By doing so, the project manager may discover the reasons why some stakeholders are not fully comprehending the status of the project based on the reports that are being circulated, and may initiate changes to the communications management plan to address them. For example, the project manager may decide to use a different report format, frequency, or distribution method that suits the needs and preferences of the new stakeholders. Adding the issue to the issue log and determining the corrective action (option A) is a possible outcome of Monitor Communications, but not the best answer. Creating a fishbone diagram to determine the root cause for the misunderstanding (option B) is a tool that can be used in Monitor Communications, but not the only one. Sharing the communications management plan and reminding all stakeholders of the agreed-upon reporting templates (option D) is not likely to solve the problem, as it may imply that the new stakeholders are at fault for not understanding the reports, rather than acknowledging that the communication needs may have changed. References:

PMBOK Guide, 6th edition, page 386-387, section 10.2 Manage Communications

PMP Exam Prep, 10th edition, page 415, question 415, answer and explanation