请阅读短文。 Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewerebroughtupinthesameway,mybrothersandsisterssoonabandonedtheirpressedflowersandinsects.Unlikethem,Ihadnoearformusicandlanguages.IwasnotanearlyreaderandIcouldnotdomentalarithmetic. BeforeWorldWarIwespentoursummerholidaysinHungary.Ihaveonlythedimmemoryofthehousewelivedin,ofmyroomandmytoys.NordoIrecallclearlythelargefamilyofgrandparents,aunts,unclesandcousinswhogatherednextdoor.ButIdohaveacrystal-clearmemoryofdogs,thefarmanimals,thelocalbirdsandaboveall,theinsects. Iamanaturalist,notascientist.Ihaveastrongloveofthenaturalworld,andmyenthusiasmhasledmeintovariedinvestigations.Ilovediscussingmyfavoritetopicsandenjoyburningthemidnightoil,readingaboutotherpeople'sobservationsanddiscoveries.Thensomethinghappensthatbringstheseobservationstogetherinmyconsciousmind.Suddenlyyoufancyyouseetheanswertotheriddle,becauseitallseemstofittogether.Thishasresultedinmypublishing300papersandbooks,whichsomemighthonorwiththetitleofscientificresearch. Butcuriosity,akeeneye,agoodmemoryandenjoymentoftheanimalandplantworlddonotmakeascientist;oneoftheoutstandingandessentialqualitiesrequiredisself-discipline,aqualityIlack.Ascientistcanbemade.Anaturalistisborn.Ifyoucancombinethetwo,yougetthebestofbothworlds. Accordingtotheauthor,abornnaturalistshouldfirstofallbe 查看材料
A.full of ambition B.self-disciplined C.full of enthusiasm D.knowledgeable正确答案C
