The situation that resulted in president andrew johnson's impeachment was, at its heart, an issue surrounding a) reconstruction of the south. b) his nominees to the supreme court. c) expansion into indian territories. d) a secret treaty with great britain.

The correct answer is A. Reconstruction.

Even though one of the most well known formal charges against Andrew Johnson was his violation of the Tenure of Office Act, for firing Edward Stanton without Congressional approval, the underlying reason for his impeachment was his Reconstruction policies. Many northern politicians felt that he did not adequately punish the former Confederate states for their role in starting the Civil War.

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.