题目内容：
根据以下材料，回答题Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemsthatfouroutoffiveyoungpeoplenowgetonwiththeirparents,whichistheoppositeofthepopularly-heldimageofunhappyteenagerslockedintheirroomafterendlessfamilyquarrels.Animportantnewstudyintoteenageattitudessurprisinglyshowsthattheirfamilylifeismoreharmoniousthanithaseverbeeninthepast."Weweresurprisedbyjusthowpositivetoday'syoungpeopleseemtobeabouttheirfamilies,"saidonememberoftheresearchteam,"They'reexpectedtoberebelliousandselfish,butactuallytheyhaveotherthingsontheirminds:theywantacarandmaterialgoods,andtheyworryaboutwhetherschoolisservingthemwell.There'smorenegotiationanddiscussionbetweenparentsandchildren,andchildrenexpecttotakepartinthefamilydecision-makingprocess.Theydon'twanttorocktheboat."
Soitseemsthatthisgenerationofparentsismuchmorelikelythanparentsof30yearsagototreattheirchildrenasfriends."Myparentsarehappytodiscussthingswithmeandwillingtolistentome,"says17-year-oldDanielLazall,"IalwaystellthemwhenI'mgoingoutclubbing.AslongastheyknowwhatI'mdoing,they'refinewithit."SusanCrome,whoisnow21,agrees."Lookingbackonthelast10years,therewasalotofwhatyoucouldcallnegotiation.Forexample,aslongasI'ddoneallmyhomework,IcouldgooutonaSaturdaynight.ButIthinkmygrandparentswerealotstricterwithmyparentsthanthat."
Maybethispositiveviewoffamilylifeshouldnotbeunexpected.Itispossiblethattheideaofteenagerebellionisnotrootedinrealfacts.Aresearchercomments,"Oursurprisethatteenagerssaytheygetalongwellwiththeirparentscomesbecauseofabriefperiodinoursocialhistorywhenteenagerswereregardedasdifferentbeings.Butthatideaofrebellingandbreakingawayfromtheirparentsreallyonlyhappenedduringthatonetimeinthe1960swheneveryonerebelled.Thenor-malsituationthroughouthistoryhasbeenasmoothchangefromhelpingoutwiththefamilybusi-nesstotakingitover."
Whatisthepopularimageofteenagerstoday?______ A．Theyworryaboutschool
B．Theydislikelivingwiththeirparents
C．Theyhavetobelockedintoavoidtroubles
D．Theyquarrelalotwithotherfamilymembers
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