Jeff Is Running Slightly Late on the Morning Drive to Work

Jeff is running slightly late on the morning drive to work when he notices one of his mother's friends pulled onto the side of the road with a flat tire.She doesn't appear to have a phone,and she looks upset.Jeff pulls over and asks if he can help her.According to Kohlberg,Jeff is in which level of moral development?

A) conventional reasoning
B) preconventional reasoning
C) postconventional reasoning
D) mid-level reasoning