At Play$-$it$-$Safe Pharmaceuticals Company, a maker of sunscreen products, the union reps strongly discouraged the firm's union employees from buying the company's products during the forthcoming summer season. Recently, they also took out an ad with an important message for consumers: "Don't give Play$-$it$-$Safe your money. They don't share it with their employees!" These actions describe:

secondary boycott.

primary boycott.

direct strikebreaker initiative.

strikebreaker tactic.