Name of the coures ( Business Communication )

Ali, Sam, Raja, and Temi are working on a new project. They wanted to solve a crucial problem that has been obstructing the completion of their goal for several weeks. After a long argument and several constructive and destructive conflicts the team finds a proper developmental solution which is willingly supported by all the members. Which phase of group development is this? * Brainstorming Orientation Reinforcement Emergence