Has anyone answered this yet?
I believe that this is a primary source document
Answer:
As the country grew, certain elements led some towns to morph into large urban centers, while others did not. The following four innovations proved critical in shaping urbanization at the turn of the century: electric lighting, communication improvements, intracity transportation, and the rise of skyscrapers.
Explanation:
Answer: A
just adding this here because my answer’s too short
