According to the PMBOK® Guide, a project manager’s sphere of influence starts with the project team and extends outward to the organization and the industry. To maximize influence specifically within the project team, the project manager relies heavily on interpersonal skills and emotional intelligence.

Relationship and Communication Skills: Top project managers understand that projects are delivered by people. By demonstrating superior communication—active listening, transparency, and clarity—and building strong relationships based on trust, they gain the respect and cooperation of the team.

Positive Attitude: Leadership is contagious. A project manager who displays a positive attitude, especially during challenging phases, helps maintain team morale and fosters a collaborative environment where team members feel empowered to contribute.

Leading by Example: Influence within the team is rarely about formal authority (legitimate power); it is about referent power (the team following because they respect the leader) and expert power. Consistently demonstrating these soft skills allows the PM to guide the team toward project objectives more effectively than rigid management alone.

Why other options are incorrect:

Option A: Consider management standards, economic factors, and sustainability strategies: These are elements of Strategic and Business Management. While important for the project ' s overall success, they relate more to how the PM interacts with the organization or environment, not specifically how they influence the project team.

Option B: Contribute knowledge and expertise to others within the profession: This describes how a project manager influences the Industry/Profession. It involves mentoring, contributing to standards (like PMI), and staying current with trends, but it is external to the daily team dynamic.

Option C: Address political and strategic issues that impact viability: This describes the PM’s role in influencing the Organization and Sponsors. While critical for protecting the project from external threats, it is a " governance " or " political " focus rather than a team-focused leadership behavior.