Which statement about president lyndon johnson's upbringing is true?

a. he grew up with racist attitudes because his father was a member of the ku klux klan.

b. as a child, he showed no interest in politics and didn't run for office until he was in his 40s.

c. as a young man, he learned about poverty by teaching poor mexican american children.

d. he was born into a wealthy dallas family that paid for his education at harvard.

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.