What tactic used by the management of a company could be considered the opposite of a strike?

The correct answer is Lockout.

Explanation: Lockout occurs when the employer prevents all or part of his employees from entering the premises of the business establishment to work. The objective of the employer is to emotionally destabilize his employees so that they give up claiming higher salaries, etc., because, as a rule, during the lockout period, the employee does not pay the remuneration of his employees, causing fear among them. In addition, the worker fears losing his job.