题目内容：
请阅读Passage2。完成第小题。
Anewstudyshowsthatstudentslearnmuchbetterthroughanactive,iterativeprocessthatinvolvesworkingthroughtheirmisconceptionswithfellowstudentsandgettingimmediatefeedbackfromtheinstructor.
TheresearchwasconductedbyateamattheUniversityofBritishColumbia(UBC),Vancouver,inCanada,ledbyphysicsNobelistCarlWieman.Inthisstudy,Wiemantrainedapostdoc,LouisDeslauriers,andagraduatestudent,EllenSchelew,inaneducationalapproach,called"deliberatepractice",thatasksstudentstothinklikescientistsandpuzzleoutproblemsduringclass.Foroneweek,DeslauriersandSchelewtookoveronesectionofanintroductoryphysicscourseforengineeringmajors,whichmetthreetimesforonehour.Atenuredphysicsprofessorcontinuedtoteachanotherlargesectionusingthestandardlectureformat.Theresultsweredramatic:Aftertheintervention,thestudentsinthedeliberatepracticesectiondidmorethantwiceaswellona12-questionmultiple-choicetestofthematerialasdidthoseinthecontrolsection.Theywerealsomoreengagedandapost-studysurveyfoundthatnearlyallsaidtheywouldhavelikedtheentire15-weekcoursetohavebeentaughtinthemoreinteractivemanner.
"It'salmostcertainlythecasethatlectureshavebeenineffectiveforcenturies.Butnowwe'vefiguredoutabetterwaytoteach"thatmakesstudentsanactiveparticipantintheprocess,Wiemansays.The"deliberatepractice"methodbeginswiththeinstructorgivingstudentsamultiple-choicequestiononaparticularconcept,whichthestudentsdiscussinsmallgroupsbeforeansweringelectronically.Theiranswersrevealtheirgraspofthetopic,whichtheinstructordealswithinashortclassdiscussionbeforerepeatingtheprocesswiththenextconcept.
Whilepreviousstudieshaveshownthatthisstudent-centeredmethodcanbemoreeffectivethanteacher-ledinstruction,Woemansaysthisstudyattemptedtoprovide"aparticularlycleancomparison...tomeasureexactlywhatcanbelearnedinsidetheclassroom."Hehopesthestudypersuadesfacultymemberstostopdeliveringtraditionallecturesand"switchover"toamoreinteractiveapproach.Morethan55coursesatColoradoacrossseveraldepartmentsnowofferthatapproach,hesays,andthesamethingishappeninggraduallyatUBC.
Theresultsoftheresearchrevealthat_________. A．thestudentsintheexperimentalsectionperformedbetteronatest
B．thestudentspreferredthetraditionallecturestodeliberatepractice
C．theentire15-weekcoursewasactuallygiveninthenewmanner
D．thestudentsinthecontrolsectionseemedtobemoreengaged
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