题目内容：
阅读下列短文，回答题：(C)Facialexpressionscarrymeaningthatisdeterminedbysituationsandrelationships.Forexample,inAmericanculture(文化)thesmileisingeneralanexpressionofpleasure.Yetitalsohasotheruses.Awoman’ssmileatapoliceofficerdoesnotcarrythesamemeaningasthesmileshegivestoayoungchild.Asmilemayshowloveorpoliteness.Itcanalsohidetruefeelings.Itoftencausesconfusion(困惑)acrosscultures.Forexample,manypeopleinRussiasmilingatstrangersinpublictobeunusualandevenimproper.YetmanyAmericanssmilefreelyatstrangersinpublicplaces(althoughthisislesscommoninbigcities).SomeRussiansbelievethatAmericanssmileinthewrongplaces;someAmericansbelievethatRussiansdon’tsmileenough.InSoutheastAsianculture,asmileisfrequentlyusedtocoverpainfulfeelings.Vietnamesepeoplemaytellasadstorybutendthestorywithasmile.
Ourfacesshowemotions(情感),butweshouldnotattemptto“read”peoplefromanothercultureaswewould“read”someonefromourownculture.Thefactthatmembersofoneculturedonotexpresstheiremotionsasopenlyasdomembersofanotherdoesnotmeanthattheydonotexperienceemotions.Rather,thereareculturaldifferencesintheamountoffacialexpressionspermitted.Forexample,inpublicandinformalsituationsmanyJapanesedonotshowtheiremotionsasfreelyasAmericansdo.Whenwithfriends,JapaneseandAmericansseemtoshowtheiremotionssimilarly.
ItisdifficulttogeneralizeaboutAmericansandfacialexpressivenessbecauseofpersonalandculturaldifferencesintheUnitedStates.PeoplefromcertainculturalbackgroundsintheUnitedStatesseemtobemorefaciallyexpressivethanothers.Thekeyistotrynottojudgepeoplewhosewaysofshowingemotionaredifferent.Ifwejudgeaccordingtoourownculturalhabits,wemaymakethemistakeof“reading”theotherpersonincorrectly.WhatdoesthesmileusuallymeanintheU.S.? A．Lov
B．Politenes
C．Jo
D．Thankfulnes
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