GH Gartner Industries Approaches Union Representatives About Scheduling Midterm Negotiations

GH Gartner Industries approaches union representatives about scheduling midterm negotiations in accordance with the collective bargaining agreement.The union refuses to meet with management,claiming that there is nothing to negotiate.Which of the following is most likely to be true in this case?

A) The union's refusal to bargain with GH Gartner is legal because the parties did not have a dispute prior to the request to have midterm negotiations.
B) The union's refusal to bargain with GH Gartner is illegal because refusing to bargain is an unfair labor practice.
C) The union's refusal to bargain with GH Gartner is legal because unions can refrain from bargaining if they feel that it would cost them more than usual.
D) The union's refusal to bargain with GH Gartner is illegal because it constitutes a breach of the management clause.