Which of the following is an example of a population-wide intervention to reduce substance use that involves policy measures?

• A. SBIRT in healthcare
• B. Individual counseling
• C. Community-based prevention programs
• D. Taxation and restricting advertising

Answer: (D)

Population-wide interventions aim to shape the environment and social norms that influence substance use through policies that affect everyone, not just individuals. Taxation and restricting advertising are classic policy measures because they are enacted by government and apply broadly. Increasing the cost of substances through taxes and limiting exposure to marketing change the incentives and cues that drive use, reducing consumption across the population.

Other options operate at the individual or program level rather than as broad policy changes. Screening, brief intervention, and referral to treatment is a clinical process focused on people who are identified in healthcare settings. Individual counseling targets personal behavior, not the wider population. Community-based prevention programs work at the community level and may alter norms or services, but they are not inherently policy levers unless they’re implemented as formal policies.