Final answer:
Migration can be a risk factor for schizophrenia by exposing individuals to stressors like discrimination, lack of economic opportunities, and social isolation, especially when combined with a genetic predisposition to the disease.
Step-by-step explanation:
Migration is an environmental risk factor for schizophrenia that likely acts by increasing an individual's exposure to several stressors.
Based on research, factors like discrimination, lack of access to economic opportunities, and social isolation can increase stress levels, which when combined with genetic vulnerability, can contribute to the development of schizophrenia. The combination of genetics and environmental stressors, such as those encountered in adverse migration situations, can increase the risk of developing schizophrenia. This aligns with studies suggesting that genetic predisposition and environmental conditions together heighten the risk for the disease.
Therefore, the correct answer is: c. All of these answers are correct - as discrimination, lack of economic opportunities, and social isolation are all stressors that can be experienced during migration and contribute to the onset of schizophrenia amongst individuals with a genetic predisposition.