This one is D- “Viet, who desperately needed an idea for his paper, had a moment of brilliance at lunchtime.”
A is the correct choice please mark brainliest ; )
I believe the answer is: The sector Model
The sector model was popularized in 1939 in order to create <span>concentric zone </span>model<span> of city development. Using this model for building a city would give the city enough space for important infrastructure to be bulit and enough space for outward expansions of the city.</span>