Members of Local 878 feel their union no longer serves their interests and they want to no longer be represented by them. The members must: a. conduct a union card solicitation campaign. b. have the employer complete a card check. c. file a decertification petition. d. send a certified letter to the union indicating the bargaining unit held a public card signing and 60% of the bargaining unit members signed the back stating they willfully and without coercion, no longer intend to be in the union or pay the associated dues