Answer:
a. achieving stage.
Explanation:
Warner Schaie is a developmental German psychologist who has focused on the cognitive stages of people along their lifespan.
According to him, people go through different stages of cognitive development (since childhood and until they are old) along their life span.
The Achievement stage is the second stage of his theory and it takes place in young adulthood, according to Schaie during this stage the individual's primary cognitive tasks are to achieve personal goals in the long term future (starting a family, being successful in their careers, make contributions to society) by applying the intellectual skills that they learned when they were younger (adolescents).
They changed because now they have a total vision of what a group can improve, and understand that they should not focus only on one area so that practice and better possibilities can happen, they focus on the whole.
Similar aspects to those of before are the aspects that are still an agenda such as the discussion of morality and things that were still portrayed earlier.
Slaves lots and lots of slaves