The Notion of "Purposeful Behavior" in the Economic Perspective Suggests

The notion of "purposeful behavior" in the economic perspective suggests that:

A) People will tend to stick with a particular choice for a long period of time
B) Economic analysis will provide people with a single "right" way to behave
C) Economists do not believe that people can sometimes behave impulsively
D) One person's choice may differ from another's if their circumstances and information differ