To find a shorter route to asia
Answer: Urban = Hight Population Density
Suburban = medium density
rural = low density
Explanation: Think of the areas which are described. In a city, people are usually packed in tight areas, such as apartment buildings. Cities usually have the highest population as well. In suburban areas(neighborhoods) there are still a big population but, they are more spaced out. In rural areas(farms, small towns) there are less people. Because of this, they are more spread out.
Schools were segregated everywhere in the country
It might be B though.