What Is the Central Insight of Action Identification Theory

What is the central insight of action identification theory?

A) People define themselves and their behaviors largely in terms of the social groups to which they belong.
B) People focus on concrete details when thinking about the distant future, but abstract aspects when thinking about the immediate future.
C) People's descriptions of their actions can range from more concrete to more abstract.
D) The effort a person extends on a goal is a function of the value of the goal and their expected ability to achieve it.