The Kristallnacht was a
a German concentration camp at which thousands of Jews were executed.
b
a set of racial laws that excluded Jews from German citizenship.
c
a destructive Nazi rampage against the Jews.
d
Hitler's account of his movement and his ideas.

Spanish conquistadors demanded labour from natives.

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.