Select all that apply Identify the true statements about the impact of the Mackay doctrine or the legality of permanent strike replacements on the labor movement from the labor perspective. (Check all that apply.) Multiple select question. The use of permanent strike replacements fails to keep a business operating during a strike. It results in employers having vastly greater power in the U.S. labor relations system. It favors labor unions and provides them protection from being permanently replaced. The hiring of permanent strike replacements busts labor unions