Answer:
D. construction of modern multi-lane roads
Step-by-step explanation:
the construction of highways and improved road infrastructure played a crucial role in facilitating the growth and accessibility of suburban areas. These roads provided efficient transportation options, allowing residents to commute to and from the suburbs more easily, access employment opportunities, and connect with urban centers. The expansion of road networks was a significant catalyst for the suburbanization trend that occurred in the 1950s.
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