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who isDonAlD krooDsmAA、thE Author oF thE Book CAllED thE singing liFE oFBirDs. B、thE sCiEntist oF A progrAm CAllED thE singing liFE oFBirDs. C、thE Author oF thE mAgAzinE CAllED thE singing liFE oFBirDs. D、thE proFEssor oF A univErsity stuDying thE singing liFE oFBirDs.