Whateveryoudo,don,tchallengeachimpanzeenamedAyumutoanumbermemorygame.In2007,Ayumubecamefamousforhislightningspeedatagamethatgoeslikethis:Aplayerviewsacomputerscreenwherethenumbers1through9appearbrieflyatonceandthenturntowhitesquares.Theplayerthentapsthesquareswherethenumbershadbeen,inorderfrom1to9.Peoplecandoit.ButnohumancompetitorhasevercompletedthegamefasterormoreaccuratelythanAyumuthechimp.ForalmostfiveyearsAyumuremainsundefeated.PsychologistNicholasHumphreyofDarwinCollegeatCambridgeUniversityinEnglandnowthinksheknowsthesecretbehindthechimp,sability.HumphreysuspectsAyumu,sbrainmayhaveaconditionthatallowsthechimptoseenumbersascolors.ThiswouldmeanthatAyumumayseeacolorglowafterthenumberdisappears.Then,insteadofrememberingthenumbers,heremembersasequenceofcolors,eachassociatedwithanumber.TheconditionthatHumphreybelievesAyumumayhaveiscalledsynesthesia.Humanswithsynesthesiamayassociatenumbersandletterswithcolors.Forexample,apersonmayseethenumber"5"asthecolorblue.Untilnow,scientistshadassumedonlyhumanscouldhavesynesthesia.Humphreyfoundtheinspirationforhisideaata2011scientificconference.There,heheardapresentationaboutAyumu'smemoryabilitiesandanothertalkaboutsynesthesia.Hethenputthetwoideastogether.NoteveryoneisconvincedthatHumphreyiscorrect.PrimatologistTetsuroMatsuzawaofthePrimateResearchInstituteatKyotoUniversityinJapanhasspentdecadesstudyingtheamazingmemoriesofchimpanzees,includingAyumu.Hemaintainsthatchimpssimplyhavefastermemoryrecallthanpeople.WhatisAyumufamousfor_____?
A.Hisgiftinplayingcomputers.
B.Histalentincalculatingnumbers.
C.Hisskillintappingthenumberedsquares.
D.Hisamazingperformanceinamemorygame.