Rulers of the zhou dynasty established the mandate of heaven to

a. prove the legitimacy of dynastic rule
b. emphasize the need for two emperors at a time
c. justify their opposition to democracy
d. denounce the superiority of god over man

Hello
the real answer to this questions is, A. prove the legitimacy of dynastic rule

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.