The correct answer to this open question is the following.
Although the question does not include options and other references, we can say that the history of the United States, unfortunately, includes racial segregation since Colonial America times.
With the slave trade, thousands of Africans landed in North America to work as slaves in the English colonies. Later, slavery became a common thing in America. Most slaves worked in the large filed plantations of the south. The Civil War was in part, due to the issue of slavery. After the war, and despite the Emancipation Proclamation of President Abraham Lincoln, during the Reconstruction period, southern states created legislation such as the Jim Crow laws or the Black Codes to limit the rights of African Americans. Then, the surge of supremacist groups like the Ku Klux Klan.
Today, with the recent incidents we have witnessed in the news, we can see how racism is an ingrained part of American society, not only to African Americans but to other minorities such as Latinos, Muslims, or Asian people.