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
Epidemics of Relapsing Fever are caused by: 
Select and explain. 
A. Louse, B. Soft tick, C. Hard tick, D. Rat flea
A: Louse
Answer: A: Louse 
Explanation: Louse