Akeypartoftheteachingistandem(纵排的)running.Oneantleadsanotherslowlyalongaroutetothenew-foundhome.Thepupilantmemorizestheroutesothatitcanfinditswaybackhomebyitselfandthenleadanotheranttothenewhome,andtheprocessrepeats.(1)What'stheroleofthesmallrobotinthestudy?CA.Astudent.B.Ateacher.C.Aresearcher.D....