This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
After a thorough study of socio-demographic characteristics of a population in Dhok Ratta, a relevant method of health education against smoking was employed to this population. Upon assessing the population habits even after lapse of 2 years, no change in the behaviour of the smokers was note what is likely to be missing in this programme to achieve the desired results? 
Select and explain. 
A. Knowledge of beliefs, B. Knowledge of cultures, C. Reinforcement, D. Required devotion
C: Reinforcement
Answer: C: Reinforcement 
Explanation: None