Use the word "empirical" as an adjective in a complex sentence

Which answer best explains the overall impact of the chicken on native american populations in the new world? negative; it destroyed much needed grain crops neutral; it was not well adopted by native americans insignificant; other animals were more quickly accepted positive; it brought a good source of protein to the native american diet

States' compliance with the native american reservation treaties drawn up by the federal government for the native american nations is:

How have changes in transportation affected washington, d.c.