Final answer:
The diathesis-stress model states that mental disorders develop when a biological predisposition to the disorder is set off by stressful circumstances. It highlights the interaction between genetic factors and environmental factors in the development of mental disorders. Option C.
Step-by-step explanation:
The theory that states that mental disorders develop when a biological predisposition to the disorder is set off by stressful circumstances is called the diathesis-stress model.
This model suggests that individuals may have a genetic or biological vulnerability to developing a mental disorder, and that this vulnerability is triggered or activated by stressful life events or circumstances.
For example, someone with a family history of depression may have a genetic predisposition to the disorder. However, they may only develop depression if they experience significant stressors such as a traumatic event, loss of a loved one, or chronic stress over an extended period of time.
The diathesis-stress model highlights the interaction between genetic factors and environmental factors in the development of mental disorders. It recognizes that both nature (genetics) and nurture (environmental influences) play a role in shaping mental health. Option C.