Why did the railroads initially divide the United States into four standard time
zones?

Originally each locale used its own time: when the sun was directly overhead then it was noon there. ... This setup for telling time began to become impractical as transportation became extensive, reliable, and rapid

Explanation:

b)

it created free trade throughout the colonial territories.

- a government ruled by the people, or assembly. officials monarchy - a single ruler like a king. over time some city-states, like athens would change governments. what this means is that all the citizens voted on all the laws.