资料：Arewalkerssmarterthandrivers? Areportpublishedlastmonthsaysm

资料：Arewalkerssmarterthandrivers? AreportpublishedlastmonthsaysmetropolitanareasintheUnitedStatesthatwerefoundtobemorepedestrian-friendlyalsooftenhadhigherlevelsofGDP-andtheircitizenswerebettereducated. ThestudywasconductedbySmartGrowthAmerica,anurbanadvocacygroupbasedintheDistrictofColumbia.Itlookedatthe30biggestmetrozonesintheUS,andrankedthembyhowmuchoffice,retail,andresidentialareawasconducivetowalking. Thequestionis,why?Dobrainierpeoplejustliketowalkandnotdrive?It'sacomplicatedanswer.Whatwedon'tknowiswhetherwalkableplacesattracteducatedpeople,orwhethereducatedpeoplemovetocertainplacesthatthenbecomemorewalkable. That'snotall:Educationlevelsaren'tjusthigherinwalkablecities.GDPis,too.ThegapbetweenthehighestandlowesturbanmetrosbyGDPinthestudyisachasmof49%,whichscholarcallsa"firstandsecondworldgap.Thisisseriousstuff." Ofcourse,correlationdoesn'tequalcausation.There'snotenoughdatatodefinitivelysaywhytheseurbanareasarefilledwitheducatedpeople.Butit'sdefinitelyastartingpointforconversation:Manysocioeconomicandgenerationaltrendstheworldovercouldhelpexplainwhyuniversitygraduatesgravitatetowardcrowded,subway-linedmetropolisesthesedays.Infact,suchanintellectualinfluxhasstartedtochangetheentirefacesofsomeurbanareas. Increasedurbanizationisn'ttheonlyreasoncar-eschewingcitiesseesmartercitizens.Youngpeopleplayarole,too.Millennials-thosebornbetweenaround1981and1996-arethemosteducatedgenerationinhistory.Nearlyhalfofthemholdabachelor'sdegreeorhigher.They'realsoallmovingtocities,unliketheirparents.ThesespikesintheworkforcetranslateintometroswithhigherGDPandhigheroveralleducationlevels. Whatphenomenonhasbeenfoundbyscholars?

A.Entire faces of urban areas are changing fast.

B.Metropolitan areas are more pedestrian-friendly and richer.

C.Educated people prefer to live in walkable places.

D.Walkable places attract educated people.

正确答案是B