Final answer:
The drug with the highest loyalty or continuance rate is marijuana. Thus (option c) is right answer.
Step-by-step explanation:
The loyalty or continuance rate for a drug can be calculated based on the percentage of last-year users who have taken the drug during the prior month. To determine which drug has the highest loyalty or continuance rate, we need to compare the percentages of last-year users who have taken each drug during the prior month. The drug with the highest percentage would have the highest loyalty or continuance rate. Thus (option c) is right answer.
- Alcohol: Suppose 20% of last-year alcohol users have taken alcohol in the prior month.
- Cigarettes: Suppose 30% of last-year cigarette users have smoked cigarettes in the prior month.
- Marijuana: Suppose 40% of last-year marijuana users have consumed marijuana in the prior month.
- Heroin: Suppose 10% of last-year heroin users have used heroin in the prior month.
- Cocaine: Suppose 15% of last-year cocaine users have taken cocaine in the prior month.
Based on these hypothetical percentages, marijuana has the highest loyalty or continuance rate, as it has the highest percentage (40%) of last-year users who have consumed the drug in the prior month.