问题详情

完成下列各选项BLisawasrunninglate.Lisa,25,hadalottodoatwork,plusvisitorsontheway:herparentswerecominginforThanksgivingfromherhometown.Butasshehurrieddownthesubwaystairs,shestartedtofeeluncomfortablywarn.Bythetimeshegottotheplatform,Lisafeltweakandtired--maybeithadntbeenagoodideatogivebloodthenightbefore,shethought.Sherestedherselfagainstapostclosetothetracks.Severalyardsaway,Frank,43,andhisgirlfriend,Jennifer,foundaspotclosetowherethefrontofthetrainwouldstop.Theyweredeepindiscussionaboutahousetheywerethinkingofbuying,Butwhenheheardthescream,followedbysomeoneyelling,"Oh,myGod,shefellin!"Frankdidnthesitate.Hejumpeddowntothetracksandransome40feettowardthebodylyingontherails."No!Notyou!"hisgirlfriendscreamedafterhim.Shewasrighttobealarmed.BythetimeFrankreachedLisa,hecouldfeelthetracksshakingandseethelightcoming.Thetrainwasabout20secondsfromthestation.Itwashardtolifther.Shewasjustout.Buthemanagedtoraiseherthefourfeettotheplat-form.sothatbystanderscouldholdherbythegrinsanddragherawayfromtheedge.ThatwaswhereLisabrieflyregainedconsciousness,feltherselfbeingpulledalongtheground,andsawsomeoneelseholdingherpurse.Lisathoughtshedbeenrobbed.Awomanheldherhandandamangavehisshirttohelpstopthebloodpouringfromherhead.Andshetriedtotalkbutshecouldnt,andthatwaswhensherealizedhowmuchpainshewasin.Policeandfireofficialssoonarrived,andFranktoldthestorytoanofficer.Jennifersaidherboyfriendwascalmontheirdo-minutetrainridedowntown--justashehadbeensecondsaftertherescue,whichmadeherthinkaboutherreactionatthetime."!sawthetraincomingandIwasthinkinghewasgoingtodie."sheexplained.WhatwasthemostprobablecauseforLisasweakness？
A.Shehadrunalongway.
B.Shefelthotinthesubway.
C.Shehaddonealotofwork.
D.Shehaddonatedbloodthenightbefore.
请帮忙给出正确答案和分析，谢谢！