Explanation/Reference:
Explanation:
The project communications management plan is a document to define who needs what information,

when the information is needed, and the modality the information is expected. Stakeholder communication preferences are also recorded here. What is Project Communication Management?
Project Communications Management is one of the nine Knowledge Areas. It employs the processes required to ensure timely and appropriate generation, collection, distribution, storage, retrieval, and ultimate disposition of project information. The following processes are part of Project Communications Management: Identify Stakeholders Plan Communications

Distribute information

Manage Stakeholder Expectations

Report Performance

The Project Communications Management processes provide the critical links among people and information that are necessary for successful communications. These processes interact with each other and with the processes in the other Knowledge Areas as well.
Incorrect Answers:
B: The project reporting structure defines who reports to whom, not the preferences and requirements for communication.
C: The project schedule defines when project activities are to occur.
D: The project scope management plan defines how the scope is created, managed, how changes to the scope are managed, and how the scope is validated.