Which Situation Is Most Consistent with the Results of Twin

Multiple Choice

Which situation is most consistent with the results of twin studies of schizophrenia?

A) When both twins carry the gene for schizophrenia, only one will develop symptoms.
B) Schizophrenia is more likely to materialize in a twin who experiences extreme stress.
C) Twins who inherit the gene for schizophrenia very rarely present symptoms of the disorder.
D) Having a father with schizophrenia greatly increases the chance that male twins will develop the disorder.