Which Statement Best Supports the Prediction That Alcoholism Is a Genetic

Which statement best supports the prediction that alcoholism is a genetic disease?

A) A specific gene that causes alcoholism was already found in 1990.
B) Three studies completed in 1998 showed that genetic factors play a greater role than environmental factors.
C) In the research, statistical associations between genetic factors and alcoholism are very strong.
D) Children of alcoholics are three to seven times more likely to be at risk for developing alcoholism.