题目内容：
Questionsarebasedonthefollowingpassage
Materialculturereferstothetouchable,material"things"--physicalobjectsthatcanbeseen,held,felt,used--thatacultureproduces.Examininganation'smaterialculturecantellusaboutthegroup'shistoryandwayoflife.Similarly,researchintothematerialcultureofmusiccanhelpusunderstandthemusicculture.Themostvividway,ofcourse,ismusicalinstruments.Wecannothearforourselvestheactualsoundofanymusicalperformancebeforethe1870swhenthephonographwasinvented,sowerelyoninstrumentsforimportantinformationaboutmusicculture,theirremotepastandtheirdevelopment.
Herewehavetwokindsofevidence:instrumentswellpreservedandpicturesofinstrumentsinart.
Throughthestudyofinstruments,aswellaspreservedpaintings,writtendocuments,andsoon,wecanexplorethemovementofmusicfromtheNearEasttoChinaoverathousandyearsago,orwecanoutlinethespreadoftheinfluenceoftheeasterncountriestoEuropethatresultsinthedevelopmentofmostoftheinstrumentsonthesymphonyorchestra.
Sheetmusicorprintedmusic,tooismaterialculture.Printedversionslimitvarietybecausetheytendtostandardizeanysong,yetfolkmusicstimulatespeopletocreatenewanddifferentsongs.Besides,theabilitytoreadmusicnotation(乐谱)hasafar-reachingeffectonmusiciansand,whenitbecomeswidespread,onthemusiccultureasawhole.
Onemoreimportantpartofmusic'smaterialcultureistheinfluenceoftheelectronicmedia-radio,recordplayer,taperecorder,television,andvideocassette,withthefuturepromisingtalkingandsingingcomputersandotherdevelopments.Thisisallpartofthe"informationrevolution,"atwentiethcenturyphenomenonasimportantastheindustrialrevolutionwasinthenineteenth.Theseelectronicmediaarenotjustlimitedtomodernnations;theyhaveaffectedmusicculturesallovertheglobe.Theyhavebroughtaboutchangestotraditionalmusicinstruments.
Researchintothematerialcultureofanationisofgreatimportancebecause__________. A．ithelpsproducenewculturaltoolsandtechnology
B．itcanreflectthewayoflifeofthenation
C．ithelpsunderstandthenation'spastandpresentaswellasitswayoflife
D．itcandemonstratethenation'scivilization
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