WWhat is the link between heredity and drug addiction? A. Some people have genes that make it easier for them to become addicted to drugs. B. Genes are not related to addiction. C. Substances cause people to have addicted genes. D. Everyone has genes that make it easy to become addicted to drugs.Hat is the link between heredity and drug addiction? A. Some people have genes that make it easier for them to become addicted to drugs. B. Genes are not related to addiction. C. Substances cause people to have addicted genes. D. Everyone has genes that make it easy to become addicted to drugs.