题目内容：
根据以下材料，回答题ThefirstEuropeanstockexchangewasestablishedinAntwerp,Belgium(比利时),in1531.TherewerenostockexchangesinEnglanduntilthe1700's.Amanwishingtobuyorsellsharesofstockhadtofindabroker(agents)totransacthisbusinessforhim.InLondon,heusuallywenttoacoffeehouse,becausebrokersoftengatheredthere.In1773,thebrokersofLondonformedastockexchange.
InNewYorkCity,brokersmetunderanoldbutton-woodtreeonWallStreet.TheyorganizedtheNewYorkStockExchangein1792.TheAmericanStockExchange,thesecondlargestintheUnitedStates,wasformerlycalledtheCurbExchangebecauseofitsoriginonthestreetsofNew
YorkCity.
Astockexchangeisamarketplacewherememberbrokersbuyandsellstocksandbonds(证券)ofAmericanandforeignbusinessesonbehalfofthepublic.Astockexchangeprovidesamarketplaceforstocksandbondsinthesamewayaboardoftradedoesforcommodities.Thestockbrokersreceiveasmallcommissiononeachtransactiontheymake.
Thestockholdermaysellhisstockwhereverhewantstounlessthecorporationhassomespecialruletopreventit.Pricesofstockchangeaccordingtogeneralbusinessconditionsandtheearningsandfutureprospects(前景)ofthecompany.Ifthebusinessisdoingwell,thestockholdermaybeabletosellhisstockforaprofit.Ifitisnot,hemayhavetotakealoss.
Inthe1600's,ifamanwantedtobuyorsellsharesofstock,hehadtodoitthrough_' A．thegovemment
B．himself
C．abroker
D．thestockexchange
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