This question belongs to the People domain because it focuses on enabling the team to work effectively and removing confusion about priorities. PMI's Disciplined Agile guidance explains that the product owner prioritizes the product backlog, signaling to the team which work is most important, while the team then executes based on that ordered work. When team members repeatedly ask what to do first, the root problem is not team effort; it is lack of clear backlog prioritization.
Option A is weaker because team members do not normally own backlog prioritization in agile; that is primarily the product owner's responsibility. Option C is too broad and does not solve the immediate prioritization issue. Option D may help temporarily, but daily coordination meetings are not the right place to repeatedly sort priorities if the backlog should already be ordered before work begins. PMP-style reasoning favors clarifying ownership and creating a sustainable process. Therefore, the project manager should work with the product owner to ensure the backlog is properly prioritized so the team can focus on the highest- value work without constant confusion.