Final answer:
The primary purpose of conducting stakeholder mapping in the project planning phase is to identify and group project stakeholders.
Step-by-step explanation:
The primary purpose of conducting stakeholder mapping in the project planning phase is B) To identify and group project stakeholders.
Stakeholder mapping involves identifying and categorizing all individuals, groups, or organizations that have an interest in or can be affected by the project. It helps project managers understand the different stakeholders, their roles, and their level of influence. By mapping stakeholders, project teams can effectively engage and communicate with them throughout the project, ensuring their needs and expectations are taken into account, and minimizing potential risks and conflicts.