Based on the following passage, what was the intended effect of building cities in concentric circles? The first major urban planning trend of the 20th century was Ebenezer Howard's Garden City movement, outlined in his 1902 book
Garden Cities of To-Morrow, in which he envisioned cities designed as a series of concentric circles, with development flanking five
wide, circular roads, each separated by greenbelts. Each circular community could house around 32,000 people and would be connected
to a larger, circular central city and neighboring communities by rail and highways.
O to allow cities to fit in oddly shaped geographic zones
O to allow residents to live in "green" areas away from heavy industry
O to discourage the expensive and time consuming practice of zoning
to isolate the residents of each zone