Using this preliminary thesis statement, select the best, most appropriate main ideas for a preliminary outline for this preliminary thesis statement: Points: 2 a.) 1. Introduction: Rates of teen smokers over the last 20 years 2. Factors that motivate teens to start smoking 3. Strategies to prevent teens from starting to smoke 4. Conclusion: Effective cessation programs b.) 1. Relationship between motivation and quitting smoking, 2. Factors that motivate a teen's desire to quit smoking 3. Research on smoking cessation programs for teenagers, 4. Effective smoking cessation programs that target motivational factors in teens c.) 1. Current rates of teen smokers 2. Ineffectiveness of smoking prevention programs aimed at teens 3. Research on types of smoking cessation programs used on teens 4. Recommendations for more effective smoking cessation programs d.) 1. Relationship between motivation and smoking, 2. Different factors that motivate teens to start smoking 3. Different factors that motivate teens to quit smoking 4. Effective smoking prevention and cessation programs 2 Which of the following are the three main concepts within this preliminary thesis statement: Points: 2 a.) Smoking, Programs, Effective b.) Smoking, Teenagers, Predictors c.) Smoking, Teenagers, Quitting d.) Smoking, Motivation, Quitting