The psychoactive substance with the highest loyalty rate and the only drug that a majority of at-least one-time users have taken during the past month is which?

• A. Alcohol
• B. Marijuana
• C. Cocaine
• D. Heroin

Answer: (A)

Loyalty rate measures how likely people who have tried a substance are to keep using it over time. Alcohol stands out because it is legal, widely available, and deeply embedded in social life, so once someone tries it, many continue to drink regularly. That ongoing use means a majority of people who have ever used alcohol report past‑month use. In contrast, substances like marijuana, cocaine, and heroin have lower continuation after initial experimentation; fewer one‑time users keep using them month to month, so they don’t reach a majority for past‑month use. Thus alcohol is the substance with the highest loyalty rate and the majority past‑month use among those who have tried it.