A project manager holds weekly project status meetings with the project team and an outside contractor. One of the team members is best friends with the contractor, so discussions often go off-track and meetings last longer than planned. Which of the following is the BEST step for the project manager to take to resolve this issue?

A. Establish what will be discussed before the meeting and ensure the agenda is followed.
B. Talk to the team member about keeping personal discussions outside the meeting.
C. Reinforce the established project communication plan.
D. Take charge of the meeting by not allowing side-talking.