Feudalism began as a. a demand by the peasants for better living conditions and for a share in the economic prosperity of the middle ages. b. a way for the military to secure its power over the peasants and landowners. c. a means for the church to collect more taxes for its support of the nobility. d. a contract in which land was granted to the peasants in exchange for military service to the nobles.

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.