The nurse is assessing a client's risk factors for developing a substance abuse disorder. Which family characteristic would the nurse identify as the most significant risk factor?

A. One parent who is an alcoholic. A family history of substance abuse, particularly a parent with alcoholism, significantly increases the genetic and environmental risk of substance abuse in children. B. Overprotective parents. Overprotection may contribute to other issues, like anxiety, but it is not strongly associated with substance abuse. C. Being raised in an urban area. Living in an urban area does not independently indicate higher risk without other contributing factors. D. Parents who practiced strict discipline. Strict discipline may lead to rebellion in some cases, but it is not a primary risk factor for substance abuse.