根据下列内容，回答211-215题。 "Hithere.How'sitgoing?" "Oh,fine.Fine.Howaboutthisweather,huh?" "Well,Iguesswecanalwayusetherain." Whatisthat?Thisstory?Oh,justalittlelookatsmalltalk.Youknow,thoseseeminglymeaninglessconversationsyouhavedozensoftimesaday.Maybeyou'rewaitingfortheelevator,orinalineatthebank.Itallseemsprettytrivial.Idlechatterabouttrafficdoesn'tdomuchmorethanfilltheairwithemptywordsthatarequicklyforgotten.Butyoushouldknowthatsmalltalkactuallyhasabigplaceinourlives. PatOliver,assistantprofessoronarts,saysthat,"Leftunchecked,smalltalkcanbeaninvasion.It'ssopowerful.Itdoessomethingtoyou.""EverymorningafterspendinganhourandahalfonthefreewayIstartthedaywithsmalltalkwithmysecretary,"Oliversays,"IfIdon'tmakesmallconnectionwithanotherperson,Ican'twork." Whatcausesit?Asarule,you'reeithertryingtoforcesomethingintoyourlife,oryou'reusingconversationasaninvisibleforcefieldtokeepthemout.Youcanbewantingtoconnectwithanotherperson,andsmalltalkisyourintroductiontomoremeaningconversation.Thewaypeopleusesmalltalkisusuallydeterminedbywheretheyhappentobeatthetime. Taketheelevator,forinstance.Nowthere'sprimeterritory.Nobodyknowsanyoneandthere'snoreasontostartaconversation,butinvariably,someonedoes."Makingconversationinsuchpeacefulsocialsettings,"accordingtoOliver,"canconfirmyourterritory.It'sawayoffeelinglikedandaccepted." Thetopicsofsmalltalkdon'tmatter.Infact,youdon'twantanythingmoretaxingthantheweatherorthetraffic.It'snon-threateningtalkinathreateningsituation.However,theruleschangequicklywhenyou'rewithlotsofpeopledoinglotsoftalking. Let'ssayyou'reataparty.Nowit'stimetousesmalltalkasawayofmakingothersfeelmorecomfortablearoundyou,sodon'tlooksillystandingbythefoodtablealoneallnight. "Smalltalk",asinterpretedbytheauthor,__________.
A.has no real function in communication at all B.is usually meaningless and therefore useless C.is not as idle as it may seem to be D.is restricted to certain topics only正确答案C
