Ed's parents were both diagnosed with paranoid schizophrenia. ed had a very stressful childhood and has himself been recently diagnosed with the disorder. this combination of genetic predisposition and the experience of extreme stress exemplifies which model?

Vulnerability-stress.

Explanation:

The vulnerability stress model mainly focus on the mental disorders and helps to understand the main causes of the disorder. This model also explains the course of the disorder and its susceptibility to different individuals.

The vulnerability stress model states that individual stress can be determined the lifestyle of an individual. The genetic factors also plays an important role in the mental disorder of an individual. Ed's shows both the stress disorder due to genetic factors and lifestyle.

Thus, the correct answer is vulnerability-stress.