Explain why the railroad and steel industries were interdependent during the 19th century?

I'm most likely gonna be wrong on this but correct me if i am wrong

Explanation: farmers demanded regulation of railroads because it was expensive and they sold to other businesses than other settlers so they profited from it.

That's what I could think of so basically it was a way to gain more money in the end.

I hope this helped

d and a is the correct anwsers

explanation:

- 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.