It segregated them from restrooms, restaurants, fountains, and public transportation. It also affected the way they can vote.
There are two civilizations that might fit this answer.
The first is Ancient Greece, that is Athens. Athens had a democratic government that resembled a republican one but since they were only a city-state and not a huge republic then historians are wary when they talk about it in terms of republicanism. They did however have a democratic government with an elected senate and suffrage rights.
The second is Ancient Rome. Up until Augustus became the emperor and turned it into the Roman Empire, Rome was a republic. They were a republic in the true sense because they had the senate which would vote for new legislation and this covered the entire Roman republic which was huge, not just the city of Rome.
Answer: butter, gasoline, sugar, and mostly canned milk.
Explanation: they were in high demand so they had to be rationed.
Answer 'A' correctly describes the Great Wall = It was built to protect Qin's empire from foreign invasion.
Apart from defense, the Great Wall included border controls, and regulation of goods. After Qin dynasty, other dynasties had used it, to maintain their territories.
Most likely because it is the branch that is responsible for making our laws.