题目内容：
阅读文章，回答题EInhis1930essay“EconomicPossibilitiesforOurGrandchildren“,JohnKeynes,acconmist,ewrotethathumanneedsfallintotwoclasses:absoluteneeds,whichareindupewhatotherhave,andrelativeneeds,whichmakeusfeelsuperiortoourfellowsHethoughtaloughrelativeneedsmayindeedbeinsatible(无止境的)thisisnottrueofabsoluteKeyneswanssurelycorrectthatonlyasmallpartoftotalspendingiddecidedbythesuperiorityHewasgretlymistaken,however,inseetingthisdesiveastheonlysourceofdemands
Decisionstospendarealsodrivenbyideasofqualitywhichcaninfluncethedenalmostallgoods,includingevenbasicgoodslikefood.Whenacouplegoesoutforananmdinner,forexample,thethoughtoffeelingsuperiortoothersprobablynevercomestothem.Thegoalistoshareaspecialmealthatstandsoutfromothermeals.
Therearenoobviouslimitstotheescalationofdemandforquality.Forexample,porschefamouscarproducer,hasamodelwhichwasconsideredperhapsthebestsportcaronthemarkPricedatover$120,000,ithandlesperfectlywellandhasgreatspeenacceleration.Butin200theproducerintroducedsomechangeswhichmadethemodelslightlybetterinhandlingacceleration.Peoplewhoreallycareaboutcarsfindthesesmallimprovemenmtsexciting.Tothem,however,theymustpayalmostfourtimestheprice.
Byplacingthedesiretobesuperiortootherattheheartofhisdescriptionofnisationdemands,Keynesactuallyreducedsuchdemands.However,thedesireforhigherqualityhasnaturallimits.Accordingtothepassage,JohnKeynesBelievedthat_______. A．desireistherootofbothabsoluteandrelativeneeds
B．absoluteneedscomefromoursenseofsuperiority
C．relativeneedsaloneleadtoinsatiabledemands
D．absoluteneedsarestrongerthanrelativeneeds
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