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: Dental
Emporiatrics is the word used to describe the science of: 
Select and explain. 
A. Epidemics, B. Feet, C. Health of travellers, D. Child health
C: Health of travellers
Answer: C: Health of travellers 
Explanation: None