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: Microbiology
All of the following statements are false regarding plague, except 
Select and explain. 
A. Live attenuated vaccine are used, B. Septicemic Plague is highly infectious, C. Vaccine is not used to control epidemic of pneumonic plague, D. Most impoant measure to control epidemic is rodent control
D: Most impoant measure to control epidemic is rodent control
Answer: D: Most impoant measure to control epidemic is rodent control 
Explanation: Vaccine is not effective in pneumonic plague.