Final answer:
The third stage of Fisher's decision-making process is significance, which involves considering the importance and impact of the decision in terms of happiness and interests being satisfied for the greatest number of people.
Step-by-step explanation:
The third stage of Fisher's decision-making process is significance. This stage involves considering the importance and impact of the decision in terms of happiness and interests being satisfied for the greatest number of people. It requires evaluating the potential outcomes and weighing the costs and benefits to make a choice that provides the highest level of utility.