According to Kohlberg's theory of moral development, at what stage are children self centered and see their own benefit in doing something ?

Correct option is A

Lawrence Kohlberg's theory of moral development outlines stages that individuals pass through as they develop moral reasoning. Kohlberg's model is divided into three levels, each containing two stages. The behavior described in the question is typical of children at the second stage of the first level, also known as the "Individualism and Exchange" stage. In this stage, children start to recognize that there is not just one right view that is handed down by the authorities. Instead, different individuals have different viewpoints. They see their own benefit in doing things and often behave in ways they believe will serve their own interests, perhaps through an action-for-reward basis.
Information Booster:
(d) The first stage in the first level involves obedience and punishment orientation, where children behave well to avoid being punished and not necessarily for any self-centered benefit.
(b) The third stage in the second level involves children behaving according to social expectations and roles.
(c) The fifth stage in the third level represents a social contract orientation, where individuals recognize the importance of societal laws but also that these laws might conflict with personal values, which is not characterized by self-centered behavior.