Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopedachecklistofstressfulevents.Theyappreciatedthetrickypointthatanymajorchangecanbestressful.Badeventslike“seriousillnessofafamilymember”werehighonthelist,butsoweresomehelpfullifechangingeventslikemarriage.WhenyoutaketheHolmesRaheyoumustrememberthatthescoredoesnotshowhowyoudealwithstress—itonlyshowshowmuchyouhavetodealwith.Andwenowknowthatthewayyoudealwiththeseeventsdramaticallyaffectsyourchancesofstayinghealthy.Bytheearly1970s,hundredsofsimilarstudieshadfollowedHolmesandRahe.AndmillionsofAmericanswhoworkandliveunderstressworriedoverthereports.Somehowtheresearchgotboileddowntoamemorablemessage.Women’smagazinesranheadlineslike“Stresscausesillness.”Ifyouwanttostayphysicallyandmentallyhealthy,thearticlessaid,avoidstressfulevents.Butsuchsimplisticadviceisimpossibletofollow.Evenifstressfuleventsaredangerous,many－likethedeathoflovedone－areimpossibletoavoid．Moreover,anywarningtoavoidallstressfuleventsisaprescriptionforstayingawayfromchancesaswellastrouble.Sinceanychangecanbestressful,apersonwhowantedtobecompletelyfreeofstresswouldnevermarry,haveachild,takeanewjobormove.Theideathatallstressmakesyousickalsotakesnonoticeofalotofwhatweknowaboutpeople.Itsupposeswe'reallvulnerable(脆弱的)andnotactiveinthefaceofthedifficultsituation.Butwhatabouthumanabilityandcreativity?Manycomethroughperiodsofstresswithmorephysicalandmentalstrengththantheyhadbefore.Wealsoknowthatalongtimewithoutchangeorchallengecanleadtoboredomandphysicalandmentalstrain.Thestudiesonstressintheearly1970sledto（）。

A. widespreadconcernoveritsharmfuleffects
B. greatpanicoverthementaldisorderitcouldcause
C. anintensiveresearchintostress-relatedillness
D. popularavoidanceofstressfuljobs