Psychological Approaches to Treating Depression Share Which Assumption

Psychological approaches to treating depression share which assumption?

A) Depression is a physical problem that should be treated with medication.
B) Depression should be treated by changing how people interact with family members and loved ones.
C) Depression stems from what one has learned in the past, so it should be treated by "unlearning" maladaptive behaviors.
D) Depression should be treated by helping people recognize, interpret, evaluate, and change how they think about and respond to past losses.