A.Theycanbeendlesslyimprovedaswebetterunderstandhowtotr...
问题详情：A.Theycanbeendlesslyimprovedaswebetterunderstandhowtotreatanimals.B.ExpertshavebrokenfreshgroundinbreedingcaptiveanimalsC.YetcriticssuggestthatanimalsshouldnotbekeptincageD.Studieshaveclearlys...