题目内容：
根据下列内容，回答题：C
LastnightIwasdrivingfromHarrisburgtoLewisburg，distanceofabouteightymiles.Itwaslate.SeveraltimesIgotstuckbehindaslow-movingtuckonanarrowroadwithasolidwhitelineonmyleft,andIbecameincreasinglyimpatient.
Atonepointalonganopenroad,Icametoacrossingwithatrafficlight.Iwasaloneontheroadbynow,butasIdrovenearthelight,itturnedredandImadeastop.Ilookedleft,rightandbehindme.Nothing.Notacar,nosuggestionofcarlamps,butthereIsat,waitingforthelighttochange,theonlyhumanbeingforatleastamileinanydirection.
Istartedwonderingwhy1refusedtorunthelightIwasnotafraidofbeingcaught,becausetherewasclearlynopolicemanwound.andtherecertainlywouldhavebeennodangeringoingthroughit..
Muchlaterthatnight,thequestionofwhyI'dstoppedforthatlightcamebacktome.IthinkI
stoppedbecauseit'spartofacontract(契约)weallhavewitheachother.It'snotonlythelaw,butitisanagreementwehave,andwetauteachothertohonorit:wedon'tgothroughredlights.
Trustisourfirstinclination(倾向).Doubtingothersdoesnotseemtobenaturaltous.Thewholeconstructionofoursocietydependsonmutual(相互)trust,notdistrustWedowhatwesaywe'lldo;weshowupwhenwesaywe'llshowup;andwepaywhenwesaywe'llpay.Wetrusteachotherinthesematters,andwe'reangryordisappointedwiththepersonororganizationthatbreaksthetrustwehaveinthem.
Iwassoproudofmyselfforstoppingfortheredlightthatnight.
Whydidtheauthorgetimpatientwhiledriving?
A.Hewaslonelyontheroad.
B.Hewassloweddownbyatruck.
C.Hegottiredofdrivingtoolong.
D.Hecameacrosstoomanytrafficlights.
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答案解析：