Which Result Provides Evidence That Genes Play a Role in Schizophrenia

Multiple Choice

Which result provides evidence that genes play a role in schizophrenia?

A) Only about 1 percent of the population displays schizophrenia.
B) Children of identical twins, one of whom had schizophrenia, are more likely to develop the disorder, regardless of whether their parent was the twin with schizophrenia or the twin without it.
C) Identical twins are more likely to be discordant for schizophrenia than non-identical twins are.
D) Parents of identical twins with schizophrenia are more likely to show symptoms of the disorder, even after their children's symptoms are in remission.