Final answer:
The stage of team development where total integration is achieved and conflicts are managed creatively is known as the performing stage, marking a mature and efficient team.
Step-by-step explanation:
The team development stage where total integration is achieved and members are able to creatively address complex and interpersonal conflicts is known as the performing stage. This is the phase where team members are highly collaborative, have established strong inter-personal relationships, and work effectively towards the team goals. The members are competent, autonomous and able to handle the decision-making process without supervision. Unlike the storming and norming stages, where conflicts and team dynamics are worked out, the performing stage demonstrates a team that has reached a level of maturity and operates with a high degree of efficiency and harmony.