题目内容：
根据以下材料，回答题Myfatherwaschiefengineerofamerchantship,whichwassunkinWordWarII,ThebookNightoftheU-boatstoldthestory.MemoriesInSeptember,1940,mymother,sisterandIwenttoSwansea,wheremyfather'sshipwasgettingreadytosail.Webroughthimafamilyphotographtobekeptwith
himatalltimesandkeephimsafe.ThenIremembermymotherlyingfacedown,sobbing.Shehadheardfromafriendthattheshiphadbeensunkbyatorpedo(鱼雷).Icanrememberthearrivalofthetelegram(电报),whichinthosedaysalwaysbroughtbadnews.Mygrandmotheropenedit.Itread,"Safe.LoveTed."Mymostvividmemoryisbeingwokenandbroughtdowntositonmyfather'sknee,hisarm
inabandage.HewasjudgedunfittoreturntoseaandtookashorejobinGlasgowfortherestofthewar.ForaslongasIcanremember,hehadaweakheart.Mothersaiditwascausedbythe
torpedoes.Hesaiditwasbecauseofthecigarettes,whichever,hediedsuddenlyinhisearly50s.
TenyearslaterIreadNightoftheU-boutsandwasabletocompletethestory.
TorpedoOnetorpedostrucktheship;Fatherwasintheengineroom,wherethethirdengineerwaskilled.Heshutdowntheenginestoslowtheshipmakingiteasierforittobeabandoned.Bythe
titnehegotondesk(甲板)hewasalone.Everylifeboatwasgoneexceptonewhichhadstuckfast.Whenhetriedtocutitfree,itswungagainsttheship,injuringhishandandarm.Hehadnochoicebuttojump-stillwiththephotographinhispocket.
Threedayslater,heandothersurvivorsweresafeinGlasgow.All23withhimsignedthebackofthephotograph.
AToastInmyroomisthebookandthephotograph.Often,glassinhand;IhavewonderedhowIwouldhavedealtwithanexplosion,asinkingship,ajumpintoavastoceanandawaitforrescue?
Lest(以免)weforget,Ihavesomemorewhiskyandtoasttheheroesofthewar.
WecaninferthatthemotherandchildrenwenttoSwansea A．tomeetafriend
B．toseethefatheroff
C．totakeafamilyphoto
D．toenjoythesailingoftheship
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答案解析：