A, because if we serve justice to the criminals in society we will be able to achieve peace faster and more efficiently.
Negro men and women could not vote, which would allow white people to vote for whoever will keep things the same and not allow change. Segregation would be very upsetting, think about not being able to use the nice bathrooms at your home, instead you use an outhouse. Negros were not allowed to be as educated so they could not gain power. knowledge is power.
It decreased and very significantly so!
Most of native Americas died of diseases brought by Europeans; but some were also killed directly by the Europeans. Many also mixed with the Europeans (by marriage or rape...) so there was also a mixed indigenous-white population.
ps. C and D is essentially the same answer
Answer:
To the north and west of Ancient China were two of the world's largest deserts: the Gobi Desert and the Taklamakan Desert. These deserts also provided borders that kept the Chinese isolated from the rest of the world. This is why the Great Wall of China was built to protect the Chinese from these northern invaders.