Why Do Some Experienced Planners Argue Against Labeling One Planning

Why do some experienced planners argue against labeling one planning scenario as "most likely" or "probable"?

A) Because it is better to assess more precise probabilities in contingencies
B) Because it does not provide a quantitative basis for differentiating this scenario from "optimistic, surprise-free, and pessimistic" labels
C) Because futurists have concluded that unlabeled scenarios are always better
D) Because program planners tend to develop strategy only for the most likely contingency
E) Because developing contingencies that have a low probability of happening is viewed by management as a waste of time.