题目内容：
根据下面内容，回答题
Anewschemeforgettingchildrentoandfromschoolisbeingstartedbytheeducationau-thoritiesinpartofEasternEngland．Thiscouldendtheworriesofmanyparentsfearfulfortheirchildren'ssafetyontheroads.
UntilnowtheCountryCouncilhasonlybeenpreparedtoprovidebusservicesforchildrenlivingmorethanthreemilesfromtheirschool,orsometimeslessifspecialreasonsexisted．Nowithasbeendecidedthatifagroupofparentsaskforhelpinorganizingtransporttheywillbepre-paredtogoahead,providedthearrangementwillnotlosemoneyandthatchildrentakingpartwillbeattendingtheirnearestschool.
ThenewschemeistobetriedoutthistermforchildrenlivingatMiltonwhoattendImpingtonschool．Thechildrenlivejustwithinthethree-milelimitandtheCouncilhassaidinthepastitwillnotundertaketoprovidefreetransporttotheschool．ButnowtheyhaveagreedtoorganizeabusservicefromMiltontoImpingtonandback,aplanwhichhasthesupportoftheschool'sheadmas-ter.
Between50and60parentshavesaidtheywouldliketheirchildrentotakepart．Finalcalcu-lationshavestilltobecarriedout,butacouncilofficialhassaidthecosttoparentsshouldbelessthan~6.50aterm.
Theyhavebeenabletoarrangetheserviceatalowcostbecausethereisalreadyanagree-mentwiththebuscompanyforabustotakechildrenwholivefurtherawaytoImpington．ThesamebuswouldnowjustmakeanextrajourneytopickuptheMiltonchildren．Theofficialsaidtheywouldgetintouchwithothergroupsofparentswhointhepasthadaskediftransportcouldbeprovidedfortheirchildren,toseeiftheywouldliketotakepartinthenewscheme.
ThechildrentheCouncilranbusesforinthepastwerethose__________ A．whoseparentswereworriedaboutthem
B．whowouldhavehadtowalkotherwise
C．whocouldnotwalk
D．whohadtotravelalongway
参考答案：
答案解析：