The first community to use mass-production techniques, becoming a model for american suburbs, was known as

I believe the answer is: Levittown, New York

The mass production in Levittown, New york began following the world-war 1, when they were assigned to mass produce various type of military equipment.
Due to this assignment, this place become the main destination of labor workers from all over the country and became one of the region that produce the most GDP in the country.

Ibelieve it is c