Which of the following is the most serious flaw in this historian's interpretation? A historians is writing a paper on immigration to the United states...

A. He does not differentiate between male and female immigrants.
B. He fails to account for non-English immigrant groups.
C. He relies on unreliable primary source documents.
D. He focuses only on immigrants and not American Indians.

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.