Which of the Following Statements About Research Done on Children

Which of the following statements about research done on children and substance abuse prior to adolescence is most accurate?

A) It would be unethical to study child users, so no research exists.
B) Research tends to focus on childhood predictors of later use rather than correlates of actual substance abuse in childhood.
C) Research trends focus on childhood use and identify that 15% of children between the ages of 8 and 11 use alcohol.
D) Research findings have illustrated that children who show a willingness to follow rules and have one parent who drinks are strong indicators of later use.