题目内容：
根据下面内容，回答题 Itisreallyasurprisethatafterhundredsofyears,educationistshavestillfailedtodesignanythingmoreefficientandreliablethanexaminations.Itisclaimedthatexaminationstestwhatyouknow,butitiscommonknowledgethattheymoreoftendotheexactopposite.Theymaybeagoodmeansoftestingmemory,ortheskillsofworkingrapidlyunderextremepressure,buttheycantellyounothingaboutaperson'strueability.
Asanxiety-makers,examinationsaresecondtonone.Thatisbecausesomuchdependsonthem.Theyarethemarkofsuccessorfailureinoursociety.Yourwholefuturemaybedecidedinonefatefulday.Noonecanshowhisbestinwotwy,orafterasleeplessnight,yetthisispreciselywhattheexaminationsystemexpectshimtodo.
Agoodeducationshould,amongotherthings,trainyoutothinkforyourself.Theexaminationsystem,however,doesanythingbutthat.Whathastobelearntislaiddownbyasyllabus(教学大纲),sothestudentisencouragedtomemorize.Examinationsdonotmotivateastudenttoreadwidely,andtheydonotenablehimtoseekmoreandmoreknowledge.Furthermore,teachersthemselvesareoftenjudgedbytheresultsoftheirstudents'examinations.Consequently,theyhavetotraintheirstudentstomasterexamtechniqueswhichtheydislike.Themostsuccessfulcandidatesarenotalwaysthebesteducatedbutthebesttrained.
Theresultsonwhichsomuchdependsareoftennothingmorethanasubjectiveassessmentbysomeanonymous(匿名的)examiners.Theycertainlymakemistakes,becausetheyhavetomarkmountainsofscripts(答卷)inalimitedamountoftime.Theyworkunderthesamesortofpressureasthecandidates.
Themainideaofthispassageisthatexaminationsare__________. A．anxiety-makers
B．reliableandefficient
C．harmfultoeducation
D．goodmeasuresofmemory
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答案解析：