Which Statement Was NOT Presented as Evidence That Alcohol Dependence

Which statement 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) Female children of alcohol-dependent parents are more likely to develop alcohol abuse than male children in the same family.