Effectiveness can be in teaching.Logical formLearned from4 sentences. (Effectiveness studies) can be long-term.Logical formLearned from4 sentences. (Technology programs) may manifest effectiveness.Logical formLearned from4 sentences. A relative effectiveness may pertain-to an opioid.Logical formLearned from4 sentences. (Prevention strategies) may manifest effectiveness.Logical formLearned from4 sentences. (Police officers) may manifest effectiveness.Logical formLearned from4 sentences. Trials may test effectiveness of (drug abuse prevention programs).Logical formLearned from4 sentences. Agents may show evidence of effectiveness.Logical formLearned from4 sentences. (Drug abuse prevention) may manifest effectiveness.Logical formLearned from4 sentences. (Employer sanctions) may manifest effectiveness.Logical formLearned from4 sentences. Herbicides may manifest effectiveness.Logical formLearned from4 sentences. Lawsuits may manifest effectiveness.Logical formLearned from4 sentences. (Training efforts) may manifest effectiveness.Logical formLearned from4 sentences. (Counseling and testing) may manifest effectiveness.Logical formLearned from4 sentences. Spermicides may manifest effectiveness.Logical formLearned from4 sentences.