What case overturned this decision

The correct answer is B. Brown v. Board of Education

Explanation

The Brown v. Council of Education was a landmark judgment of the Supreme Court of the United States in which it was established that educational facilities in which people of different skin color are separated are inherently unequal, therefore they were considered as a denial of equal educational opportunities.

 This ruling served to overturn previous cases such as the one from Plessy v. Ferguson in 1896, which established that racial segregation was allowed in public places such as railroad places. One consequence of this court decision was the consideration of racial segregation as a violation of the Equal Protection Clause of the Fourteenth Amendment to the United States Constitution.

b.europe i believe because north america has 3 countries in a way and with all the stuff with illegal immagrants from mexico or whatever so i would say europe.

some american cities felt workers were being oppressed by business monopolies