Select the statement that is TRUE regarding information gained through family and genetic studies on the influence of genes and environment as causal factors in substance abuse.
A) Both genes and environment influence the disorder.
B) Genes are the primary predictor for risk of substance abuse.
C) No clear findings have emerged regarding the influence of these factors.
D) Environmental factors are the best predictors of who will abuse drugs.
Question 2
The prevalence of illegal drug use seems to differ across racial and ethnic boundaries. A 2006 study by the Substance Abuse and Mental Health Administration found that illegal drug use was highest among
A) Asians.
B) whites.
C) American Indians or Alaska Natives.
D) persons reporting two or more races.
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