First of all, what do you mean when u say 20 options.
Also, here is your answer:
Chronic disease: A disease that persists for a long time. A chronic disease is one lasting 3 months or more, by the definition of the U.S. National Center for Health Statistics. Chronic diseases generally cannot be prevented by vaccines or cured by medication, nor do they just disappear.
So, it is B. Lasts for a long time
