What is the premise of Vroom's decision tree approach to leadership?

a$.$ The situation should be assessed in terms of how important it is$.$

b$.$ Decisions should be made based on the needs of the organization, with little regard for the needs of employees.

c$.$ Decisions should be made based on the relationship between the leader and the subordinate.

d$.$ Managers should delegate whenever possible.

e$.$ The approach should change depending on the situation.