Which of the Following Is NOT One of the Recent

Multiple Choice

Which of the following is NOT one of the recent biological and genetic discoveries that might link alcoholism to preexisting genetic factors?

A) The flushing response is absent among alcoholics.
B) Persons with the A1 gene might be more vulnerable to alcoholism.
C) If an identical twin is alcoholic,the chances of the other identical twin becoming alcoholic are relatively high.
D) If a fraternal twin is alcoholic,the chances of the other fraternal twin becoming alcoholic are significantly higher.