Answer:
Neolithic Revolution??
because It changed the way people lived drastically and was truly revolutionary.
In Plessy v. Ferguson, the Supreme Court ruled that facilities that were "separate but equal" were permissible under the US Constitution.
This allowed the Jim Crow laws to develop wherein African Americans went to different schools, ate at different restaurants or in different sections, and were generally segregated from the population
The correct answer is option A. "Civil Rights leaders began to oppose the Vietnam War because of racial disparities in the draft." Civil Rights leaders such as Whitney Young Jr., Stokely Carmichael, Roy Wilkins, Bayard Rustin, and Martin Luther King Jr, faced the threat of the military draft, which included discrimination and violence towards people with racial background different from caucasian.
The Crusades were initiated by the Catholic Church in order to gain control of Jerusalem again, as it has fallen into the hands of the Muslims. While the Catholic Church had its goals in conquering Jerusalem, including wealth and power, it didn't foresee that the organizing of the Crusades its going to actually backfire on it and make the biggest blow to it.
The Crusades themselves had mixed outcome, sometimes winning, sometimes losing. What had much greater effect was that the Crusaders managed to bring in Europe lot of things from Asia which turned out to change the course of the history.
Because the Crusaders were in constant contact with the Muslims, they brought in numerous technological advancement in Europe. Also, through them, some of the ancient literature from Greece and Rome came back to Europe.
This prompted a huge interest among the people, especially the ones higher in the hierarchy, as they saw the potential of the new technology, but also the potential for the future based on the ancient literature. The end result was technological boom in Europe, loss of power by the Catholic Church, the Age of Discoveries, or all put in one, the Renaissance.