Which of the following is the best description of the concept of "card check" in national labor relations? Group of answer choices A method for employees to organize a labor union without a secret ballot election. A method for the NLRB to expedite processing of unfair labor practice complaints. A method for organizing a strike or picketing. A way to preserve the sanctity of union elections in keeping with the general notion that voting should take place by secret ballot. Part of the negotiation process over a collective bargaining agreement where each side proposes changes to the agreement using "cards