American urbanization during the first half of the 19th century was made possible primarily because of advances in
a) consumer electricity.
b) food preparation and hygiene.
c) military weapons and tactics.
d) public and private transportation

The advances in public and private transportation were one of the key factors of the American urbanization in the first half of the 19th century. Wave of immigrants enter the country which paved way to the rapid increase of factory industries because of the huge labor force they provide.

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