Research has shown that women who were exposed to the flu virus during the first trimester of pregnancy: were not at risk for bearing a child who later developed schizophrenia. had a sevenfold increased risk of bearing a child who later developed schizophrenia. had only a slightly increased risk of bearing a child who later developed schizophrenia. had a twofold increased risk of bearing a child who later developed schizophrenia.
The answer in this question is that the research has shown that women who were exposed to the flu virus during her first trimester of pregnancy had a sevenfold increased risk of bearing a child who later developed schizophrenia. Schizophrenia is defined as a mental disorder by abnormal social behavior and failure to understand what is real.