Passage Summary: We build cities with lots of space and parking because people drive cars; the author thinks that if we didn't have cars, cities wouldn't look this way.

Conclusion: Modern city geography would necessarily be different today if people had not generally used personal automobiles.

Reasoning: Current urban features, such as widely scattered housing lots and massive shopping mall parking lots, were specifically designed to accommodate the use of cars.

Analysis: The author assumes that because cars caused this specific layout, this layout could not have existed without cars. This is a classic case of confusing a sufficient condition for a necessary one. Just because cars led to this geography doesn't mean something else, like a desire for privacy or a different technology, couldn't have led to the same result. Look for an answer that points out the author ignores other potential causes for this urban design.