Alonzo's Crooked Cake Shop has had workers attempting to unionize in order to be able to work fewer hours per week. Alonzo's argues in court that because there is only one other cake shop in the region, a strike and other union activities would disrupt competition in the cake business. Alonzo's is using __________ to prevent union activities.

• Antitrust law(s)
• Federal injunction(s)
• Yellow dog contract(s)
• Criminal conspiracy law(s)