Consider This Moral Dilemma: "On His Way to School, a Boy

Consider this moral dilemma: "On his way to school, a boy named Jerrie sees another boy fall in the mud and start to cry. The boy says he hurt himself and asks Jerrie to help him up, but Jerrie is worried that if he helps him, he will get himself all muddy. What should Jerrie do?" Which response would be considered the LEAST advanced, according to Kohlberg's theory of moral reasoning?

A) "Jerrie should help because the boy is hurt."
B) "Jerrie should not help because his teacher will think he is bad if he gets to school all dirty."
C) "Jerrie should help because he will feel bad if the boy is hurt and he doesn't help him."
D) "Jerrie should not help the boy because he will get dirty, and he doesn't want to get dirty."