What best explains why Chicago’s location was important to it becoming a railroad junction?

Chicago is near Detroit, the Motor City of the United States.

Chicago is known for its ethnic diversity and lively culture.

Chicago is the only city where a number of railroad lines met.

Chicago’s location on Lake Michigan and the middle of the country allowed goods to be shipped out of the city after they arrived by railroad.

I think it's the third one.

5 answers

Didn't the rail lines come after it was decided to make Chicago a rail hub?

There's a better answer.
Last one :)
that's what I was thinking to thanks guys
What the answers
is it D??