In contemporary clinical psychology, various theories aim to explain the onset of psychological disorders. One widely discussed framework posits that psychological disorders result from a complex interplay between genetic predisposition and environmental factors, often referred to as the diathesis-stress model. According to this model, individuals have a biological vulnerability that may not lead to a psychological disorder unless triggered by stressors. Given this understanding, which of the following scenarios best illustrates the application of the diathesis-stress model in the context of a specific psychological disorder?