The CEO complains about the frequency of project communications: five project emails per week that the CEO has no time to review, and the content does not explain project status. What should the project manager do first?

The project manager should first review the communications management plan. This plan details how, when, and to whom project information will be communicated. The CEO's complaint indicates a potential mismatch between the planned communication and the CEO's needs, suggesting the plan might be outdated or poorly executed. Reviewing it allows the project manager to identify the root cause of the issue before making changes. Meeting with the team (option A) or sending a single summary (option B) are potential solutions, but without understanding the existing plan and its deviations, these actions might be premature or ineffective. Reviewing the stakeholder engagement plan (option D) is also important, but the communications management plan directly addresses the "how, when, and to whom" of information flow, making it the most relevant document to consult first for communication issues.