题目内容：
根据以下资料，回答题。Inarecentannouncement,HarvardandtheMassachusettsInstituteofTechnology（MIT）saidthattheyhavejoinedforcestoofferfreeonlinecoursesinanefforttoattractmillionsofonlinelearnersworldwide.Beginningthisfall,anumberofcoursesdevelopedbyteachersatbothuniversitieswillbeofferedonlinethroughanew$60millionprogram,knownasedX．“AnyonewithanInternetconnectionanywhereintheworldcanuseouronlinecourses,”HarvardPresidentDrewFaustsaidduringameetingtoannouncetheplan.
MIThasofferedaprogramcalledOpenCourseWarefortenyearsthatmakesmaterialsfrommorethan2,000classesfreeonline．Ithasbeenusedbymorethan100millionpeople．InDecember,theschoolannounceditalsowouldbeginofferingaspecialcertificate,knownasMITx,forpeoplewhocompletecertainonlinecourses．Harvardhaslongofferedcoursestoawiderpopulationthroughasimilarprogram.
TheMITxwillserveasthefoundationforthenewlearningplatform.
MITPresidentSusanHockfieldsaidmorethan120,000peoplesignedupforthefirstMITxcourse．ShesaidHarvardandMIThopeotheruniversitieswilljointheminofferingcoursesontheopen-sourceedXplatform.
“Fastenyourseatbelts,”Hockfieldsaid.
Otheruniversities,includingStanford,YaleandCarnegie-Mellon,havebeenexperimentingwithteachingtoaglobalpopulationonline.
TheHarvard-MITprogramwillbemonitoredbyanot-for-profit（非盈利的）organizationbasedinCambridge,tobeownedequallybythetwouniversities．BothMITandHarvardhaveprovided$30milliontostarttheprogram．TheyalsoplantousetheedXplatformtoresearchhowstudentslearnandwhichteachingmethodsandtoolsaremostsuccessful.Accordingtothistext,edXis_______. A．apartofthefreeMITOpenCourseWare
B．afreecomputerprogrambyMITandHarvard
C．aHarvard-MITplatformoffreeonlinecourses
D．afreeprogramonlineforuniversitiesworldwide
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