Final answer:
The diathesis-stress model proposes that psychological disorders develop due to an interaction between underlying vulnerability and environmental stressors.
Step-by-step explanation:
The correct answer to the question is c) Diathesis-stress model. The diathesis-stress model proposes that psychological disorders develop due to an interaction between an underlying vulnerability or diathesis, which can be caused by genetic inheritance, biological processes, or early learning experiences, and environmental stressors. The vulnerability or diathesis increases the likelihood of developing a psychological disorder when an individual is exposed to stressful life events or environmental triggers.