Katie bought a few t-shirts from a garage sale. While purchasing them, she tried her best to bargain as she knew the seller was charging her a higher price than he charged other customers. After reaching home, she found that there was an extra t-shirt in her bag for which she did not pay. As her mother had taught her to return things that did not belong to her, Katie went back to the store and returned the extra t-shirt. According to Kohlberg's theory of moral development, Katie belongs to the stage of moral development.