Which scholar described how people think about moral issues in terms of stages of development?

A) Heifetz
B) Kohlberg
C) Plato
D) Crain

Kohlberg is the scholar who described how people think about moral issues in terms of stages of development, which includes six stages of moral development ranging from pre-conventional to post-conventional. Choice A, Heifetz, is known for his work on adaptive leadership, while Choice C, Plato, is an ancient Greek philosopher who emphasized the importance of moral reasoning. Choice D, Crain, is the author of a developmental psychology textbook, but not specifically known for the stages of moral development.