1-30Which of the Following Statements Is Supported by Research on the Role

1-30.Which of the following statements is supported by research on the role of genetic influences in unipolar disorder?

A) The more severe the depressive disorder,the greater the genetic contribution.
B) Twin studies do not consistently find evidence of an inherited susceptibility to depression.
C) Genes play a more significant causal role in bipolar disorders than they do in unipolar disorders.
D) Bipolar and unipolar disorders are equally heritable.