题目内容：
Questionsarebasedonthefollowingpassage.
Perhapsthemoststartlingtheorytocomeoutofkinetics,thestudyofbodymovement,wassuggestedbyProfessorRayBirdwhistell．Hebelievesthatphysicalappearanceisoftenculturallyprogrammed．Inotherwords,welearnourlooks--wearenotbornwiththem．Ababyhasgenerallyunformedfacialfeatures．Ababy,accordingtoBirdwhistell,learnswheretosettheeyebrowsbylookingatthosearound--familyandfriends．ThishelpsexplainwhythepeopleofsomeregionsoftheUnitedStateslooksomuchalike．NewEnglandersorSouthernershavecertaincommonfacialcharacteristicsthatcannotbeexplainedbygenetics．Theexactshapeofthemouthisnotsetatbirth,itislearnedafter.
Infact,thefinalmouthshapeisnotformeduntilwellafterpermanentteethareset．Formany,thiscanbewellintoadolescence．Ahusbandandwifetogetherforalongtimeoftencometolooksomewhatalike．Welearnourlooksfromthosearoundus．Thisisperhapswhyinasinglecountrythereareareaswherepeoplesmilemorethanthoseinotherareas．IntheUnitedStates,forexample,theSouthisthepartofthecountrywherethepeoplesmilemostfrequently．InNewEnglandtheysmileless,andinthewesternpartofNewYorkstatestillless．ManySouthernersfindcitiessuchasNewYorkcoldandunfriendly,partlybecausepeopleonMadisonAvenuesmilelessthanpeopleonPeachtreeStreetinAtlanta,Georgia.
Peopleindenselypopulatedurbanareasalsotendtosmileandgreeteachotherinpubliclessthandopeopleinruralareasandsmalltowns.
RayBirdwhistellbelievesthatphysicalappearance__________. A．haslittletodowithculture
B．canbeinfluencedbyculture
C．iseverchanging
D．variesfromplacetoplace
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