What was the reason jefferson sent lewis and clark on an expedition? a) he wanted to find a route to the pacific ocean b) he wanted to expand the fur trading c) he wanted to claim more land beyond louisiana d) he wanted to conquer spanish-held territories

B) He wanted to expand the fur trading

Ship building industry , good luck : )

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.