A unilateral change as it pertains to bad faith bargaining occurs when:

A) The union agrees to a change in wages, benefits or other terms of employment without first consulting the employees
B) The government imposes a settlement on the employer and the union because they are unable to reach an agreement
C) An employer changes wages, benefits or other terms of employment without first bargaining with the union
D) An employer changes wages, benefits or other terms of employment without first consulting the employees

A unilateral change occurs when an employer makes changes to wages, benefits or other terms of employment without consultation or bargaining with the union. This is considered bad faith bargaining because it disregards the union's right to bargain collectively on behalf of its members. Choices A and D suggest that the employees were consulted or agreed to the changes, which would make it a bilateral change rather than a unilateral change. Choice B pertains to government intervention, which is not the same as a unilateral change.