请阅读Passage1。完成第下列问小题。
Passage1
Asregardssocialconventions,wemustsayawordaboutthewell-knownEnglishclasssystem.ThisisanembarrassingsubjectforEnglishpeople,andonetheytendtobeashamedof,thoughduringthepresentcenturyclass-consciousnesshasgrownlessandless,andtheclasssystemlessrigid.Butitstillexistsbelowthesurface.Broadlyspeaking,itmeanstherearetwoclasses,the\"middleclass\"andthe\"workingclass\".(Weshallignoreforamomenttheold\"upperclass\",includingthehereditaryaristocracy,sinceitisextremelysmallinnumbers;butsomeofitsmembershavetherighttositintheHouseofLords,andsomenewspaperstakesurprisinginterestintheirprivatelife.)Themiddleclassconsistschieflyofwell-to-dobusinessmenandprofessionalpeopleofallkinds.Theworkingclassconsistschieflyofmanualandunskilledworkers.
Themostobviousdifferencebetweenthemisintheiraccent.Middle-classpeopleuseslightlyvaryingkindsof\"receivedpronunciation\"whichisthekindofEnglishspokenbyBBCannouncersandtaughttooverseaspupils.Typicalworking-classpeoplespeakinmanydifferentlocalaccentswhicharegenerallyfelttoberatheruglyanduneducated.OneofthebiggestbarriersofsocialequalityinEnglandisthetwo-classeducationsystem.Tohavebeentoaso-called\"publicschool\"immediatelymarksyououtasoneofthemiddleclass.Themiddleclassestendtoliveamoreformallifethanworking-classpeople,andareusuallymorecultured.Theirmiddaymealis\"lunch\"andtheyhavearatherformaleveningmealcalled\"dinner\",whereastheworkingman′sdinner,ifhisworkinghourspermit,isatmidday,andhissmaller,late-eveningmealiscalledsupper.
Aswehavesaid,however,theclasssystemismuchlessrigidthanitwas,andforalongtimeithasbeengovernmentpolicytoreduceclassdistinctions.Working-classstudentsverycommonlyreceiveauniversityeducationandentertheprofessions,andworking-classincomeshavegrownsomuchrecentlythatthedistinctionsbetweenthetwoclassesarebecominglessandlessclear.However,regardlessofone′ssocialstatus,certainstandardsofpolitenessareexpectedofeverybody,andawell-bredpersonispolitetoeveryonehemeets,andtreatsalaborerwiththesamerespecthegivesanimportantbusinessman.Servilityinspiresbothembarrassmentanddislike.Eventheword\"sir\",exceptinschoolandincertainoccupations(e.g.commerce,thearmy,etc.)soundstooserviletobecommonlyused.
{TS}Themiddleclassmainlyreferstopeople__________.

A.whowerebornasaristocrat

B.whohavetherighttositintheHouseofLords

C.whospeakinmanydifferentlocalaccents

D.whoareprosperousbusinessmenorwhoworkinsomeprofessions