Popular sovereignty expressed what belief?

that all former slaves presently living in a free state were officially freedmen
that a territory itself should decide if it wants to allow slavery within its borders
that even if a slave escaped to a free state, he could never be a freedman
that congress should decide whether a state is a free state or a slave state

that a territory itself should decide if it wants to allow slavery within its borders

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.