Answer:
The correct answer is c) Research indicates that moral development may differ across cultures.
Step-by-step explanation:
The psychologist Lawrence Kohlberg carried out the theory of moral development, based on Jean Piaget's research, which was based on studies with children about the knowledge of morals and divided it into different stages.
On the other hand, Kohlberg agreed that the development of morality was related to the cognitive evolution stages. Still, that morality depended heavily on the cognitive processes of each person because he considered that even though an individual reaches adulthood, It does not mean that he reaches the development of morality since some adults present difficulties with their moral judgment.
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