The correct answer is C) the suburbs grew as young families moved away from the cities.
<em>The thing that happened when developers built affordable, mass-produced houses was that the suburbs grew as young families moved away from the cities.
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When developers started to build new residential zones in the suburbs thought mass-produced houses that were affordable to the citizens, young families decided to leave the cities and downtown homes to get these new houses in modern suburbs. New roads and fast highways helped people to get to new places. In those new suburbs, developers also built supermarkets, shopping centers, malls, office spaces, and many facilities and services for the people to stay there and do not move back to downtown areas. So yes, the thing that happened when developers built affordable, mass-produced houses was that the suburbs grew as young families moved away from the cities.
