Which of the following best explains how the situation described in this excerpt from a 1920 newspaper article came to be?

The Jim Crow law of Kentucky, requiring different coaches for whites and colored, was upheld today by the supreme court. The South Covington and Cincinnati Street Railway Co. brought a test of the law before the supreme court in an appeal to set aside fines for its violations which has been sustained in the lower courts. Ohio State Monitor, 19206

A. African slavery in the United States

B. The slave revolt in Haiti

C. Women's role in the French Revolution

D. Women's suffrage in Europe

The Jim Crow laws were state and local laws in the United States, promulgated by the white state legislatures, that at the time were dominated by the Democrats after the period of Reconstruction between 1876 and 1965. These laws advocated the racial segregation in all public facilities by de jure mandate under the slogan "separate but equal" and applied to African-Americans and other non-white ethnic groups in the states of the United States. In reality, this led to treatment and accommodation being generally inferior to those insured for American whites, systematizing a number of economic, educational and social disadvantages. The de jure segregation was applied mainly in the southern United States. On the other hand, in the north, segregation was generally de facto predominantly towards blacks who lived in urban ghettos.