Leto has been working hard recently on fostering a strong sense of empathy toward others with the ultimate goal of learning to accept everyone for who they are. With which of the following schools of thought is Leto most closely associated?

a. Mental disorders were the result of shattered nerves that were likely related to lifestyle problems.
b. Mental disorders were the product of demonic possession and could be treated with the use of bodily magnetism.
c. Humanistic theory
d. Mental disorders could be classified into three categories: mania, melancholia, and phrenitis.