Found this from Google, here’s the link:
https://classroom.synonym.com/negative-effects-on-the-us-economy-caused-by-world-war-ii-12084137.html
And then explain it furthermore
Michigan entered as a free state as it was one of the most north states of the U.S and still is. That meant it was filled of people that had a bad tone towards slavery. Florida is one of the most southern states and was filled with cotton farms in northern Florida ( South Florida was uninhabited by Americans cause there were marches and alligators I;e Everglades) Iowa was also a free state. Iowa was near Michigan and also had a population that disliked slavery.
From 1300s to 1500s, which is about two centuries, Japan tore itself apart in the feudal wars and all the civil conflicts. Due to Minamoto's victory, Japan transitioned to medieval feudalism and power rested upon two shogun regimes, the Kamakur and Ashikaga.
C. is your answer there you go
The right choice is B. People voting in secret balloting for the candidates of their choice.