题目内容：
Questionsarebasedonthefollowingpassage.
Womenarealotmorelikelytosufferabrokenheartthanmen,researcherssay.Thegoodnewsisthatitprobablywon'tkillpeople.
Inthefirstnationalstudyofitskind,researchersattheUniversityofArkansaslookedatratesof"brokenheartsyndrome(综合征)"--whenasuddenshockorlong-termstresscausesheartattack-likesymptomsorheartfailure—andfoundthatitoverwhelminglyaffectswomen.
Womenareatleastseventimesmorelikelythanmentosufferthesyndrome,accordingtodatapresentedrecentlyattheAmericanHeartAssociationconferenceinOrlando."It'stheonlycardiac(心脏的；心脏病的)conditionwherethere'ssuchafemalepreponderance(数量优势),"Dr.AbhiramPrasad,aMayoCliniccardiologistwhowasnotassociatedwiththestudy.Heartattackandheartdisease,ofcourse,strikemenmoreoftenandearlierinlifethanwomen.
Brokenheartsyndromecanhappeninresponsetoshockingorsuddenlyemotionalevents--bothpositiveoneslikewinningthelottery(彩票),ornegativeoneslikeacaraccidentortheunexpecteddeathofalovedone.Afloodofstresshormonesandadrenaline(肾上腺素)causespartofthehearttoenlargetemporarilyandtriggerssymptomsthatcanlooklikeheartattack:chestpain,shortnessofbreath,irregularheartrhythm.Thedifferenceisthatthefactorsthatwouldnormallycauseheartattackarenotpresent.
Doctorshavelongknownaboutbrokenheartsyndrome--firstdescribedbyJapaneseresearcherstwodecadesago--andthatitseemedtooccurmostlyinwomen.So,Dr.AbhishekDeshmukh,acardiologistattheUniversityofArkansaswhohastreatedwomenwithbrokenheartsyndrome,becamecuriousaboutjusthowgender-specifictheconditionwas.Usingafederaldatabasethatincludeddatafromroughly1,000hospitals,Deshmukhfound6,229casesofbrokenheartsyndromein2007.Ofthose,only671--justunder1l%--wereinmen.
Researchersdon'tknowwhatcausesthegenderdifference,buttheyhavesomeideas.Onetheoryisthathormonesplayarole.Anotheristhatmenhavemoreadrenalinereceptorsoncellsintheirheartsthanwomendo,"somaybemenareabletohandlestressbetter"andthechemicalsurgeitreleases,Deshmukhsaid.
What'sthefindingofthefirstnationalstudyof"brokeinheartsyndrome"? A．Itcanprobablykillpeopleallofasudden.
B．Itcancauseheartattacksorheartfailure.
C．Itdoesnoharmtopeople'shealth.
D．Itaffectsmorewomenthanmen.
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