题目内容：
根据以下材料，回答题TimRichterandhiswife,Linda,hadtaughtforover30yearsnearBuffalo,NewYork-heincomputers,sheinspecialeducation."Teachingmeanseverythingtous",Timwouldsay.InApril1998,helearnedhewouldneedaheartoperation.Itwasthekindofnewsthatleadstosomeseriousthinkingaboutlife'spurpose.
Notlongafterthesurgery,TimsawabrochuredescribingImaginationLibrary,aprogramstartedbyDollyParton'sfoundation(基金会)thatmailedabookeverymonthtochildrenfrombirthtoagefiveinthesinger'shometownofSevier,Tennessee."Ithought,maybeLindaandIcoulddosomethinglikethiswhenweretire."Timrecalls.Heplacedthebrochureonhisdesk,"asareminder."
Fiveyearslater,nowretiredandwiththatbrochurestillonthedesk,Timclickedonimaginationlibrary.Theprogramhadbeenopeneduptopartnerswhocouldtakeadvantageofbookandpostagediscounts.
ThequalityofthebookswasofgreatconcerntotheRichters.Ratherthansignuponline,theywenttoDollywoodforalook-see."Wedidn'twanttogivethechildrenrubbish."saysLinda.
Thebooks-reviewedeachyearbyteachers,literacyspecialistsandDollywoodboardmembers-includedclassicssuchasEzraJack.Keats'sTheSnowyDayandnewerbookslikeAnnaDewdney'sLlamaseries.
Satisfied,thecouplesetuptheRichterFamilyFoundationandgottowork.Since2004,theyhaveshippedmorethan12200bookstopreschoolersintheirarea.MeganWilliams,amotheroffour,ismorethanappreciative"ThisprogramintroducesustobooksI'reneverheardof."
TheRichtersspendabout$400amonthsendingbooksto200children."Somepeoplesitthereandwaittodie,"saysTim."Othersgetasbusyastheycaninthetimetheyhaveleft."
WhatledTimtothinkseriouslyaboutthemeaningoflife?______ A．Hishealthproblem
B．Hisloveforteaching
C．Theinfluenceofhiswife
D．ThenewsfromtheWeb
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