The Management at Gomars Inc

The management at Gomars Inc.,a firm manufacturing toys,is involved in a dispute with the union members representing its employees.The union members want a pay hike,but the management is not ready to approve the hike.Failing to arrive at a compromise,the disputing parties involve a third party to resolve the issue and offer a solution that is legally binding.The third party in the given scenario best represents a(n) :

A) mediator.
B) arbitrator.
C) conciliator.
D) strikebreaker.
E) scab.