ACCorDing to thE Author, thE DistinCtion BEtwEEn violEnt ACts AnD non-violEnt onEs in sports is ______. A.impossiBlE to mAkE B.not vEry ClEAr in Any CirCumstAnCEs C.too oBvious to EsCApE oBsErvAtion D.not vEry DiFFiCult to mAkE iF Enough AttEntion is pAiD to