根据下列内容，回答199-202题。 Evenasmallreductioninsaltinthedietcanbeabighelptotheheart.AnewstudyusedacomputermodeltopredicthowjustthreegramslessadaywouldaffectheartdiseaseintheUnitedStates. Theresult:thirteenpercentfewerheartattacks.Eightpercentfewerstrokes.Fourpercentfewerdeaths.Elevenpercentfewernewcasesofheartdisease.Andtwohundredfortybilliondollarsinhealthcaresavings. Researchersfounditcouldpreventonehundredthousandheartattacksandninety-twothousanddeathseveryyear. ThestudyisintheNewEnglandJournalofMedicine.KirstenattheUniversityofCalifornia,wastheleadauthor.Shesayspeoplewouldnotevennoticeadifferenceintastewiththreegrams,orone-halfteaspoon,lesssaltperday.TheteamalsoincludedresearchersatStanfordandColumbiaUniversity. Eachgramofsaltcontainsfourhundredmilligramsofsodium,whichishowfoodsmaylisttheirsaltcontent. ThegovernmentsaystheaverageAmericanmaneatstengramsofsaltaday.TheAmericanHeartAssociationadvisesnomorethanthreegramsforhealthypeople.ItsayssaltintheAmericandiethasincreasedfiftypercentsincethenineteen-seventies,whilebloodpressureshavealsorisen.Lesssaltcanmeanalowerbloodpressure. NewYorkCityMayorMichaelBloombergisleadinganeffortcalledtheNationalSaltReductionInitiative.Theideaistoputpressureonfoodcompaniesandrestaurants. MayorBloomberghasalreadysucceededinotherareas,likerequiringfastfoodplacesinthecitytolistcalorieinformation.NowastudybytheSeattleChildren'sResearchInstituteshowshowthatideacaninfluencewhatparentsorderfortheirchildren. Ninety-nineparentsofthreetosixyearoldstookpart.HalfhadMcDonald'smenusclearlyshowinghowmanycalorieswereineachfood.Theotherhalfgotmenuswithoutthecalorie information. Allthefollowingarerelatedtothesaltindietexcept__________.
A.Strokes B.heart attacks C.blood pressures D.stomach diseases正确答案D
