Happy City has three distributors of milk products. Shawn, who owns a grocery store, angers one of the distributors by insisting that additional milk be delivered on Christmas Eve. Shawn annoys another distributor after making a delivery driver wait to deliver milk. The three distributors get together and discuss the fact that they like all the other grocers in town better than Shawn. One of them has an idea that they should stop selling milk products to Shawn. The milk distributors call their friends the meat distributors and talk them into not selling meat to Shawn either. Shawn hears about the plot and wants to stop it. Which of the following best describes the agreements between the distributors of milk and meat to not sell to Shawn?