The project manager or project team should effectively negotiate and influence others who are in a position to provide the required team and physical resources for the project.
PMBoK Sixth Edition Chapter 9 States: "9.2.2.7 MEETINGS
The project manager may hold planning meetings with functional managers to estimate the resources needed per activity, level of effort (LoE), skill level of the team resources, and the quantity of the materials needed. Participants at these meetings may include the project manager, the project sponsor, selected project team members, selected stakeholders, and others as needed.
9.3.2.2 INTERPERSONAL AND TEAM SKILLS
Functional managers. Ensure that the project receives the best resources possible in the required timeframe and until their responsibilities are complete.
The project management team's ability to influence others plays an important role in negotiating resource allocation, as does the politics of the organizations involved. For example, convincing a functional manager about the high visibility of the project may influence him or her to assign the best resources to this project over competing ones.
The correct answer therefore is: "Functional Manager"
The Distractors are valid and accepted