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
An investigator is studying the impact seatbelts have on the severity of injuries incurred during a motor vehicle accident. 

Which of the following study designs would be most appropriate for answering this question? 
Select and explain. 
A. Case series, B. Case-control study, C. Cohort study, D. Clinical trial
B: Case-control study
Answer: B: Case-control study 
Explanation: None