office, retail, and residential area was conducive to walking. 它查看了美国最大的30 个地铁区，并根据办公室、零售和住宅区有助于步行的程度对它们进行了排名。故正确选项为B。33. What phenomenon has been found by scholars? (
AEntire faces of urban areas are changing fast.
BMetropolitan areas are more pedestrian-friendly and richer.
CEducated people prefer to live in walkable places.
DWalkable places attract educated people.