Which Statement BEST Reflects the Findings of Twin Studies Evaluating

Which statement BEST reflects the findings of twin studies evaluating genetic factors associated with schizophrenia?

A) If one twin has schizophrenia, the other twin-if male-has a significantly increased risk of developing schizophrenia.
B) Identical twins are almost five times as likely to develop schizophrenia as are fraternal twins.
C) If one twin has schizophrenia, there is a significantly increased risk of schizophrenia developing in the other twin, for both identical and fraternal twins.
D) If one twin has schizophrenia, there is an increased risk of schizophrenia developing in the other twin, with a substantially higher risk for identical twins.