根据下面资料，回答 Today,peopleallovertheworldaremovingoutofsmallvillagesinthecountrytogoandliveinbig,noisycities.Theyaremovingfromthepeacefulhills,mountains,fields,riversandstreamsofthecountrysidetothebusyworldofstreets,buildings,trafficandcrowds.Thismovementfromruralareastourbanareashasbeengoingonforovertwohundredyears. Inmanycountries,themainreasonwhypeoplecometoliveintownsandcitiesiswork.Afteroneortwolargefactorieshavebeenbuiltinornearatown,peoplecometofindwork,andsoonanindustrialareabeginstogrow.Thereisusuallyaresidentialareanearby,wherethefactoryworkerscanlive.Thefamiliesoftheseworkersneedschools,hospitalsandshops,somorepeoplecometoliveintheareatoprovidetheseservicesandacitygrows. Ineverymajorcityintheworld,thereisabusinessdistrictwherethebigcompanieshavetheirmainoffices.IntheUnitedStates,thisareaisusuallyinthecitycentre.Itisherethatyoucanseethehugeskyscraperofficeblocks.Thepeoplewhoworkhereoftentravelalongwaytoworkeachday.Manyofthemliveinthesuburbsofthecity,farawayfromtheindustrialareaandthecitycentre.Somesuburbsareverypleasant,withnicehousesandbiggardens.Thereareusuallyparksforchildrentoplayinandlargedepartmentstoreswhereyoucanbuyallyouneed. Butwhatisthefutureofthebigcities?Willtheycontinuetogetbigger?Perhapsnot.Somemajorcitieshaveactuallybecomesmallerinthelasttenyears,anditisquitepossiblethatonedaywewillseepeoplemovingoutofthemajorcitiesandbackintosmallertownsandvillages. Wecaneasilyknowthattheunderlinedphrase"urbanareas"inthefirstparagraphmeans_____________.
A.areas of the countryside B.areas of a town or city C.areas near the countryside D.areas near a town or city正确答案B
