题目内容：
Questionsarebasedonthefollowingpassage: Advertisementcanbethoughtof"asthemeansofmakingknowninordertobuyorsellgoodsorservices"．Advertisementaimstoincreasepeople'sawarenessandarouseinterest．Ittriestoinformandtopersuade．Themediaareallusedtospreadthemessage．Thepressoffersafairlycheapmethod,andmagazinesareusedtoreachspecialsectionsofthemarket．Thecinemaandcommercialradioareusefulforlocalmarket．Television,althoughmoreexpensive,canbeveryeffective．Publicnoticesarefairlycheapandmorepermanentintheirpowerofattraction．
Otherwaysofincreasingconsumerinterestarethroughexhibitionsandtradefairsaswellasdirectmailadvertisement．Therecanbenodoubtthatthegrowthinadvertisementisoneofthemoststrikingfeaturesofthewesternworldinthiscentury．Manybusinessessuchasthosehandlingfrozenfoods,liquor,tobaccoandmedicineshavebeenbuiltuplargelybyadvertisement．
Wemightaskwhetherthecostofadvertisementispaidforbytheproducerorbythecustomer．Sinceadvertisementformspartofthecostofproduction,whichhastobecoveredbythesellingprice,itisclearthatitisthecustomerwhopaysforadvertisement．However,iflargescaleadvertisementleadstoincreaseddemand,productioncostsarereduced,andthecustomerpaysless．
Itisdifficulttomeasureexactlytheinfluenceofadvertisementonsales．Whenthemarketisgrowing,advertisementhelpstoincreasedemand．Whenthemarketisshrinking,advertisementmaypreventabiggerfallinsalesthanwouldoccurwithoutitssupport．Whatisclearisthatbusinesseswouldnotpaylargesumsforadvertisementiftheywerenotconvincedofitsvaluetothem．
Advertisementisoftenusedto（ ）． A．deceivecustomers
B．increaseproduction
C．arousesuspicion
D．pushthesale
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答案解析：