Answer:
The correct answer is: Adjouring.
Explanation:
To begin with, <em>the model of group development</em> was first proposed by Bruce Tuckman in 1965 and whose main purpose is to focus on the stages that a team must go through in order to accomplish an ultimate goal. Moreover, the the model included 5 different stages: forming, storming, norming, performing and adjouring.
To continue, the last of the stages, the adjouring stage, involves the situation where the team have already accomplished its ultimate goal and must now split in order to every member to be reassigned to other teams and new tasks.
To sum up, <u>Alfred, Mario and Lydia are in the adjouring stage of team development</u> due to the fact that they had already been together for so long and must go on in another teams with another goals.