According to the PMBOK® Guide, a Project Manager’s Sphere of Influence is depicted as a series of concentric circles. The Project Manager has the most direct control over the center and decreasing influence as they move outward toward the organization and the industry.

Steering Committees (Choice C): These represent the highest level of governance and are typically composed of senior executives who provide strategic direction. Because they operate at an organizational level above the project, the Project Manager has the least influence over them compared to the other groups listed. Their role is to influence the project, rather than be influenced by the Project Manager.

Project Team (Choice B): This is at the core of the Project Manager ' s influence. The PM has direct, daily influence over the team ' s tasks, motivation, and performance.

Sponsors (Choice A): While higher in the hierarchy, the Project Manager works closely with the sponsor to align objectives and secure resources. The PM exerts significant influence here by providing data and reports to guide the sponsor ' s decisions.

Stakeholders (Choice D): Project managers are expected to proactively manage and influence stakeholder expectations and engagement. While this can be challenging, it is a primary responsibility of the role.

The Sphere of Influence model emphasizes that while a PM must communicate with all these entities, their ability to dictate outcomes or change perspectives diminishes as they move from the project team toward high-level organizational governance bodies like Steering Committees.