The United States refused to support popular elections in Vietnam in 1956 because they
O A. feared that the Soviet Union would take over if the elections went
against the Communists.
OB. had promised to give Vietnam back to the French.
O c. had promised South Korea that its elections would be held first.
O D. feared that Vietnam would vote for a Communist government.

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.