Dr.AlpaPatelwas__________.

问题：

阅读材料，回答下面的题目。
ANewStrategytoOvercomeBreastCancerPost-menopausal(绝经后)womenwhowalkforanhouradaycancuttheirchanceofbreastcancersignificantly,astudyhassuggested.Thereport,whichfollowed73,000womenfor17years,foundwalkingforatleastsevenhoursaweekloweredtheriskofthedisease.TheAmericanCancerSocietyteamsaidthiswasthefirsttimereducedriskwasspecificallylinkedtowalking.UKexpertssaiditwasmoreevidencethatlifestyleinfluencedcancerrisk.
ArecentpollforthecharityRamblersaquarterofadultswalkfornomorethananhouraweek,butbeingactiveisknowntoreducetheriskofanumberofcancers.Thisstudy,publishedinCancerEpidemiology,Biomarkers&Prevention,followed73.615womenoutof97,785aged50-74whohadbeenrecruitedbytheAmericanCancerSocietybetween1992and1993,soitcouldmonitortheincidenceofcancerinthegroup.
Theywereaskedtocompletequestionnairesontheirhealthandonhowmuchtimetheywereactiveandparticipatinginactivitiessuchaswalking,swimmingandaerobics(有氧运动)andhowmuchtimetheyspentsittingwatchingtelevisionorreading.Theycompletedthesamequestionnairesattwo-yearintervalsbetween1997and2009.Ofthewomen,47%saidwalkingwastheironlyrecreationalactivity.Thosewhowalkedforatleastsevenhoursperweekhada14%lowerriskofbreastcancercomparedtothosewhowalkedthreeorfewerhoursperweek.
Dr.AlpaPatel,aseniorepidemiologistattheAmericanCancerSocietyinAtlanta,Georgia,wholedthestudy,said:"Giventhatmorethan60%ofwomenreportsomedailywalking,promotingwalkingasahealthyleisure-timeactivitycouldbeaneffectivestrategyforincreasingphysicalactivityamongstpost-menopausalwomen.Wewerepleasedtofindthatwithoutanyotherrecreationalactivity,justwalkingonehouradaywasassociatedwithalowerriskofbreastcancerinthesewomen.""Morestrenuous(紧张的)andlongeractivitiesloweredtheriskevenmore."
BaronessDelythMorgan,chiefexecutiveofBreastCancerCampaign,said:"Thisstudyaddsfurtherevidencethatourlifestylechoicescanplayapartininfluencingtheriskofbreastcancerandevensmallchangesincorporateintoournormalday-to-dayactivitycanmakeadifference."
Sheadded:"Weknowthatthebestweapontoovercomingbreastcanceristheabilitytostopitoccurringinthefirstplace.Thechallengenowishowweturnthesefindingsintoactionandidentifyothersustainablelifestylechangesthatwillhelpuspreventbreastcancer."
AllofthefollowingfactorsrelatingtocancerriskwerementionedintheEXCEPT__________.

A.chiefeditorofCancerEpidemiology
B.chairoftheAmericanCancerSociety
C.headofthesurveystudy
D.chiefexecutiveofBreastCancerCampaign

参考答案：B

参考解析：

【答案】B
【解析】根据文章第四段Dr．AlpaPatel的描述可知只有选项B的“美国癌症协会的主席”符合文意。