SAT Reading & Writing Quiz
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CRAFT & STRUCTURE
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PASSAGE
Conventional wisdom in urban planning holds that increasing residential density reliably lowers transportation emissions: shorter travel distances, more viable public transit, and fewer cars per household. Recent meta-analyses generally support this link. Yet findings across metropolitan regions remain heterogeneous, with some studies observing negligible or even reversed effects. One explanation is that higher rents in newly dense neighborhoods can push lower-income residents to outlying areas, lengthening commutes. Another is that infill without street redesign may worsen congestion and idling. To clarify these dynamics, researchers are shifting from citywide averages to household-level data, tracking how relocation and mode choice interact with neighborhood design. This approach, they argue, can identify which combinations of density, pricing, and transit investments actually deliver net reductions.
Which choice best describes the function of the underlined sentence in the overall structure of the text?
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