3. When considering confounding variables, you included whether a participant's mother had the flu during pregnancy. Why did you
make that choice?
O A. Prenatal exposure to viral infections can increase the likelihood of developing
schizophrenia.
B. Prenatal exposure to viral infections can increase the likelihood that twins will
be identical.
OC. Prenatal exposure to viral infections can decrease the likelihood of developing
schizophrenia.
O D. Prenatal exposure to viral infections has no relationship to the likelihood of
developing schizophrenia.