Who was president of the united states during world war i?
a. theodore roosevelt
b. william taft
c. franklin delano roosevelt
d. woodrow wilson
user:
what effect did the sinking of the lusitania have on world war i?
a. it almost ended the war prematurely.
b. it confused britain as to whether or not the united states was its ally.
c. it outraged many americans and made it increasing difficult for the united states to remain neutral.
d. it outraged many germans and made the german

It was "D. Woodrow Wilson" who was president of the United States during World War I and the effect of the sinking of the Lusitania "outraged many Americans and made it increasing difficult for the United States to remain neutral," since many Americans lost their lives. 

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.