Research on the Genetic Predisposition Toward Schizophrenia Has Indicated That

Research on the genetic predisposition toward schizophrenia has indicated that:

A) the risk of schizophrenia for the unaffected twin, when an identical twin has schizophrenia, is greatly reduced if the twins have been reared apart.
B) among identical twins, when one twin develops schizophrenia the other twin has an 80 percent chance of developing schizophrenia.
C) children with two schizophrenic parents have a 27 to 46 percent lifetime risk of developing schizophrenia, compared to a risk in the general population of about 1 percent.
D) children with one schizophrenic parent have about the same risk of developing schizophrenia as do people in the general population.