Why did so many race riots / race massacres occur during and immediately after WWI?

the answer is title i subtitle b

answer; i believe that the correct answer is (c) arctic tundra;

states

explanation:

as the old saying goes, all politics are local. state and federal governments affect our daily lives in numerous ways. yet, in our federal system, there is supposed to be a balance between federal and state power. as james madison envisioned it in federalist no. 51, “the power surrendered by the people” would be “divided between two distinct governments,” creating a balance of power that would enable the “different governments [to] control each other.”

i think it was   tsar alexander ii