Answer:
Ebola; high mortality rate and high communicability.
Step-by-step explanation:
Epidemology may be defined as the study the pattern, analysis and disease condition in the population. The risk factors of a particular disease can by done by the epidemology of the disease.
Ebola virus causes the fatal illness in the humans. Its generally affects the minimum individual and rare among the humans and the mortality rate is quite low. This virus can be transmitted from animals to the humans and then in the human population from humans to humans.
Thus, the correct answer is option (A).