Which of the following projects best fulfilled Cyrus Avery's vision for the future of the United States? A. the development of the US interstate highway system B. the construction of the Alaska pipeline C. the completion of the transcontinental railroad D. the invention of the tractor-trailer

Ithink the answer is c

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.

Ithink its trade and commernce let me know if im wrong