Answer:
"Chicago played this vital role, creating a more national trade system instead of regional commerce."
"The geographical location of Chicago was the key to its economic success."
"The railroads were a big part of this transformation, but so where telephones, chemicals, bicycles, and other manufactured goods that were commonly shipped out of the city."
Step-by-step explanation:
You can choose any one of these sentences or do all 3.
Verified by Edge 2020 (Source 3: Encyclopedia)