单选题 An outside adviser has been brought in to ______ the dispute between the management and the union.

【正确答案】 A

【答案解析】arbitrate的意思是“做出公断”。legitimize使合法化，宣布合法化；lug使劲拉，用力拖；earmark指定(资金的)用途，特殊记号，特征。