Brown v. Board made segregations in schools illegal.
This would make the answer B.
Your answer would be a superpower or global power.
For the Greeks (or more particularly the Athenians) any system which excluded power from the whole citizen-body and was not a tyranny or monarchy was described as an oligarchy. Oligarchies were perhaps the most common form of city-state government and they often occurred when democracy went wrong.
B. Horses, because they Indians found out they no longer had to travel by foot!!
It would be first the Neolithic revolution that has happened during the prehistoric times. Next would be the Crusades when christian army tried to retake the Holy Land from the infidels and Muslims that they were fighting against. Lastly would be the Renaissance that means rebirth. Renaissance open the world into more possibilities and open the minds of the people.
