All of the Following Evidence Supports the Idea That There

All of the following evidence supports the idea that there is a strong genetic component to schizophrenia except

A) the monozygotic twin concordance rate is 48% but they share 100% of their genes.
B) first-degree relatives of schizophrenics are 12 times more likely than the general population to develop schizophrenia at some point in their lifetimes.
C) second-degree relatives of schizophrenics are four times more likely than the general population to develop schizophrenia in their lifetimes.
D) even when twins are reared apart, the difference in concordance rates is maintained, with the monozygotic rates always higher than the dizygotic rates.