Which of the Following Was NOT Presented as Evidence That

Which of the following was NOT presented as evidence that alcohol dependence is genetically influenced?

A) People who abuse alcohol tend to be impulsive and vulnerable to depression,both of which are at least partly genetic in origin.
B) Adopted children are more susceptible to alcohol dependency if one or both of their biological parents was alcohol-dependent.
C) Identical twins have twice the concordance rate for alcohol dependency of fraternal twins.
D) Alcohol abusers are typically unaware that they are dependent on the drug.