*WILL MARK BRAINLIEST* Many germans immigrated to america during this period because?
A: they had taken part in failed revolutions against harsh rulers.
B: a fungus had destroyed the wheat crop in Germany.
C: German rulers were taking away their land.
D: they lacked the skills necessary to get good jobs in Germany.

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.