根据下列内容，回答186-190题。 Fiveyearsago,DavidSmithworeanexpensivesuittoworkeveryday."1wasaclothesad-dict,"hejokes,"IusedtocarryafreshsuittoworkwithmesoIcouldchangeifmyclothesgotwrinkled."TodayDavidwearscasualclothes--khakipantsandasportsshirt--totheoffice.Hehardlyeverwearsanecktie."I'mworkingharderthanever,"Davidsays,"andIneedtofeelcomfortable." Moreandmorecompaniesareallowingtheirofficeworkerstowearcasualclothestowork.IntheUnitedStates,thechangesfromformaltocasualofficewearhavebeenslow.Intheearly1990s,manycompaniesallowedtheirworkerstowearcasualclothesonFriday(butonlyonFri-day).Thisbecameknownas"dress-downFriday"or"casualFriday"."Whatstartedoutasanex-traone-day-a-weekbenefitforworkershasreallybecomeaneverydaything."saidbusinessadviserMaislyJones. Whyhavesomanycompaniesstartedallowingtheirworkerstowearcasualclothes?Onerea-sonisthatit'seasierforacompanytoattractnewworkersifithasacasualdresscode."Alotofyoungpeopledon'twanttodressupforwork,"saystheownerofasoftwarecompany,"soit'shardtohirepeopleifyouhaveaconservativedresscode."Anotherreasonisthatpeopleseemhappierandmoreproductivewhentheyarewearingcomfortableclothes.InastudymadebyLeviStraussandCompany,85percentofemployerssaidthatcasualdresshasasideeffectonwork.Supportersofcasualofficewearalsosaythatacasualdresscodehelpsthemsavemoney."Suitsareexpensive,ifyouhavetowearoneeveryday,"onepersonsaid,"Forthesameamountofmoney,youcanbuyalotmorecasualclothes." DavidSmithreferstohimselfashavingbeen"aclothesaddict"because___________.
A.he often wore khaki pants and a sports shirt B.he couldn't stand a clean appearance C.he wanted his clothes to look tidy and clean all the time D.he didn't want to spend much money on clothes正确答案C
