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: Dental
The ultimate goal of all epidemiological studies is: 
Select and explain. 
A. Control of disease, B. Disruption of disease, C. Identification of disease, D. Quantification of disease
A: Control of disease
Answer: A: Control of disease 
Explanation: The ultimate goal is control of disease.