根据以下材料，回答题 Everyday25millionU.S.childrenfideschoolbuses.Thesafetyrecordforthesebusesismuchbetterthanforpassengercars;butnevertheless,about10childrenarekilledeachyearridingonlargeschoolbuses,andnearlyfourtimesthatnumberarckilledoutsidebusesintheloadingzones.Byandlarge,however,thenation′sschoolchildrenaretransportedtoandfromschoolsafety. Eventhoughthenumberofschoolbuscasualties(伤亡事故)isnotlarge,thesafetyofchildrenisalwaysofintensepublicconcern.Whileeveryonewantstoseechildrentransportedsafely,peoplearedividedaboutwhatneedstobedoneparticularlywhetherseatbeltsshouldbemandatory(强制). Proponentsofseatbeltsonschoolbuses--manyofthemparentsandmedicalorganizationsarguethatseatbeltsarcnecessarynotonlytoreducefatalityandinjury,butalsototeachchildrenlessonsabouttheimportanceofusingthemroutinelyinanymovingvehicle.Asidebenefit,theypointout,isthoseseatsbeltshelpkeepchildrenintheirseats,awayfromthebusdriver. OpponentsofseatbeltinstallationsuggestthatchildrenarealreadywellprotectedbytheschoolbusesthatadheretotheNationHighwayTrafficSafetyAdministrations(NHTS A)safetyrequirementssetin1977.Theyalsobelievethatmanychildrenwon′twearseatbeltsanywayandthatmaydamagethebeltsorusethemasweaponstohurtotherchildren. AnewResearchCouncilreportonschoolbussafetysuggeststhattherearealternatesafetydevicesandproceduresthatmaybemoreeffectiveandlessexpensive.Forexample,thestudycommitteesuggestedthatraisingseatbacksfourinchesmayhavethesamesafetyeffectivenessasseatbelts. ThereportsponsoredbytheDepartmentofTransportationattherequestofCongress,reviewsseatbeltsextensivelywhiletakingabroaderlookatsafetyinandaroundschoolbuses. Accordingtothepassage,the"schoolbus"is______.查看材料
A.the bus offered by the school B.the bus that has no difference from thepublic bus C.the bus that is driven by the students D.the bus that is not safe正确答案A
