If the Concordance Rate for Alcoholism Were 50 Percent Among

If the concordance rate for alcoholism were 50 percent among identical twins,which of the following would be true?

A) If you inherit the gene that encodes alcoholism,you will become an alcoholic.
B) If there is no alcoholism in your family,you will never become an alcoholic.
C) If your father is an alcoholic,you will not become an alcoholic as long as he is not involved in raising you.
D) If your twin is an alcoholic,you have an increased chance of becoming an alcoholic,but ultimately whether you become an alcoholic depends on the choices you make.