题目内容：
根据以下材料，回答题Who'stoblame?ThetrailofresponsibilitygoesbeyondpoormaintenanceofBritishrailways,sayindustrycritics.StingygovernmentsbothLaborandtoryhavecutdownoninvestmentsintrainsandrails.Inthemid-1990saConservativegovernmentpushedthroughthesaleoftheentiresubsidy-guzzlingrailnetwork.Operatingfranchiseswereparceledoutamongprivatecompaniesandaseparatefirm,Railtrack,wasawardedownershipofthetracksandstations.Inthefuture,thetheoryranbackthen,theprivatesectorcouldpayforanyimprovementswithalittlehelpfromthestateandtaketheblameforanyfailings.
todaysurveysshowthattravelersbelieveprivatizationisoneofthereasonsfortherailways'sfailures.Theyaskwhetherthepursuitofprofitsiscompatiblewithguaranteeingsafety.Worse,splittingthenetworkbetweencompanieshasmadecoordinationnearlyimpossible."Therailwaywastornapartatprivatizationandthestructurethatwasputinplacewas..,designed,ifwearehonest,tomaximizetheproceedstotheTreasury,"saidRailtrackbossGeraldCorbettbeforeresigninglastmonthinthewakeoftheHatfieldcrash.
Generally,thecontrastswithmainlandEuropearestark.OverthepastfewdecadestheGermans,FrenchandItalianshaveinvested50percentmorethantheBritishintransportationinfrastructure.Asaresult,awebofhigh-speedtrainsnowcrisscrosstheContinent,fundedbygovernmentswiltingtocommitstatefundstomajorcapitalp.rojects.Spainiscurrentlyplanning1,000milesofnewhigh-speedtrack.InFrancesuperfasttrainsalreadyshuttlebetweenallmajorcities,oftenondedicatedlines.AndinBritain?WhentheEurostartrainsthatlinkParis,LondonandBrusselsemergefromtheChannelTunnelontoBritishsoilandjointhecrowdedlocalnetwork,theymustslowdownfrom186mphtoamaximumof100mph--andtheyusuallyhavetogoevenslower.
Foronce,thegovernmentististening.Afterall,commutersarevoters,too.Inapre-votespendingspree,thegovernmenthascommitteditsefftohugeinvestmentintransportation,aswellaseducationandthepublichealthservice.Overthenext10years,therailwaysshouldgetanextra~60billion,partlythroughhighersubsidiestotheprivatecompanies.AsBlairackoowledgedlastmonth,"BritainhasbeenunderinvestedinandinvestmentiscentraltoBritain'sfuture."Youdon'thavetotellthe3millionpassengerswhousetherailwayseveryday.LastweektrainstoDarlingtonwereanhourlate--andcrawlingatLocomotionNo.1speeds.
Inthefirstparagraph,theauthortriesto A．tracethetragedytoitsdefectiveorigin.
B．remindpeopleofBritain'sgloriouspast.
C．explainthefailureofBritain'srailnetwork.
D．callforimpartialityinassessingthesituation.
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