Stephen Has Cognitive Difficulties (Has an Intellectual Disability)

Stephen has cognitive difficulties (has an intellectual disability) . He still lives with his parents but has recently found a girlfriend. He tells his new girlfriend that if they are to have sex, they must use condoms because his parents said so. According to Kohlberg's stages of moral reasoning, which level is Stephen most likely at?

A) Level 1 (preconventional)
B) Level 2 (conventional)
C) Level 3 (postconventional)
D) Level 4 (realitivism)