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
Severity of acute diseases can be best analyzed by? 
Select and explain. 
A. Standardized mortality ratio, B. Cause specific death rate, C. Case fatality rate, D. Age specific death rate
C: Case fatality rate
Answer: C: Case fatality rate 
Explanation: None