What can the project manager do to move the team to the norming phase?

A project team with members from many different countries is struggling to cooperate. The project manager accepted these difficulties during the storming phase of team development, but the team has not moved to the next phase. The project is beginning to fall behind schedule

What can the project manager do to move the team to the norming phase?
A . Plan social activities to help foster stronger interpersonal relationships and identify shared goals.
B. Speak with the project sponsor about changing the team composition
C. Figure out who is behind the issues and apply progressive disciplinary techniques.
D. Show the team the schedule impact of their communication issues and encourage them to put their differences aside

Answer: A