A business analysis communications plan is a document that describes how, when, and by whom information about the business analysis activities will be delivered to the stakeholders. It defines the communication goals, the communication requirements, the communication methods, the communication responsibilities, and the communication protocols for the business analysis process. A business analysis communications plan helps to ensure that the stakeholders are informed, engaged, and satisfied with the business analysis deliverables and outcomes12.
The other options are not correct because:
A stakeholder management plan is a document that describes how the stakeholders will be identified, analyzed, engaged, and managed throughout the business analysis process. It defines the stakeholder roles, interests, expectations, influence, and communication preferences3.
A business analysis plan is a document that describes how the business analysis activities will be planned, conducted, monitored, and controlled. It defines the business analysis approach, the business analysis scope, the business analysis tasks, the business analysis deliverables, the business analysis schedule, and the business analysis resources4.
A communications management plan is a document that describes how the project communications will be planned, structured, monitored, and controlled. It defines the project communication goals, the project communication requirements, the project communication methods, the project communication responsibilities, and the project communication protocols5.
References:
Business Analysis Expert Certification, CCBA® | IIBA®, section “BABOK® Guide v3”, chapter 2, section 2.5.5
How to create a business analysis communication plan - Lucidchart, section “What is a business analysis communication plan?”
Stakeholder Management Plan, section “Description of Change”
Business Analysis Plan, section “Description of Change”
Communications Management Plan, section “Description of Change”