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
STEPS is related: 
Select and explain. 
A. To study surveillance of risk factors for noncommunicable diseases, B. To study surveillance of incidence for noncommunicable diseases, C. To study surveillance of moality for non-communicable diseases, D. To study follow-up to treatment of non-communicable diseases
A: To study surveillance of risk factors for noncommunicable diseases
Answer: A: To study surveillance of risk factors for noncommunicable diseases 
Explanation: To study surveillance of risk factors for noncommunicable diseases