The decline of both the Han Dynasty and the Roman Empire were a slow process. What of these factors was a catalyst for the decline of both these great powers? A. heavy taxation of the lower classes, who could not afford to pay the high taxes demanded of them

B. the emperor’s decision to make himself an absolute leader whom his people must worship

C. the use of mercenary soldiers to increase the size and strength of the military

D. trade that depended on safe ocean travel for success

The answer is option a. boundary line drawn by pope alexander iv in 1493.

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.