{{B}}sECtion A、tAlk {{i}}quEstions 1 to 5 rEFEr to thE tAlk in this sECtion.At thE EnD oF thE tAlk you will BE givEn 15 sEConDs to AnswEr EACh oF thE Following FivE quEstions. now listEn to thE tAlk.{{/i}}{{/B}} ACCorDing to thE tAlk, thE union plAys thE Following rolEsExCEpt A、mEDiAtion. B.ArBitrAtion. C、nEgotiAtion. D.rEprEsEntAtion.