A nurse is reviewing the medical record of a client who recently has been diagnosed with schizophrenia. Which of the following finding is a genetic risk factor associated with the development of schizophrenia?

A. Biologic parent with schizophrenia: Having a biological parent with schizophrenia significantly increases an individual's risk of developing the disorder due to genetic and hereditary factors. Family studies have shown that the risk of schizophrenia is higher among first-degree relatives, indicating a strong genetic component. B. Biologic grandparent with fragile X syndrome: Fragile X syndrome is a genetic disorder associated with intellectual disability but is not directly related to the risk of developing schizophrenia. While genetic factors can play a role in various mental health disorders, fragile X syndrome does not specifically indicate an increased risk for schizophrenia. C. Biologic uncle with Rett syndrome: Rett syndrome is a neurological disorder that primarily affects females and is not associated with an increased risk of schizophrenia. The genetic risk for schizophrenia is more relevant among immediate family members rather than extended relatives like uncles. D. Biologic sibling with Down syndrome: Down syndrome is a chromosomal disorder caused by an extra copy of chromosome 21 and does not directly increase the risk of developing schizophrenia. While individuals with Down syndrome may experience other mental health issues, the genetic risk for schizophrenia is not associated with this condition.