John is a school prefect. He finds his best friend, who is also the

head prefect, breaking a school rule. John says that he was sorry that he has to book him (his best friend) as he could not make any exceptions. The law is the same for everybody. The above behavior of John serves as an example of:
A.conventional behavior.
B.cultural relativism.
C.post conventional behavior.
D.natural rights.
E.pre conventional behavior.