On 5, Plessy v. Ferguson ruled that segregation is legal, but in Brown v. Board of Education, they ruled that segregation is not legal and has no place in schools. But that is all I know
Just letting you know, I got this answer from the internet.
1) hunter-gathering tribes
2) small towns and nomadic groups
3) city-states and small kingdoms
4) empires
5) nation-states
Answer:B
Explanation:the bringing of unfamiliar diseases to American Indians
<span>The Opium Wars had several resounding effects on China. The first being the more obvious results of losing the war: a weakened military, weakened defenses (several were forced to be torn down after the treaty), opening up of more ports to British and others after the second Opium War (this affected the pouring in of opium as well as a greater influence of Westerners in China), a ridiculous indemnity both times, the sacking of the Summer Palace, and several others. </span>