A strike occurs when the union decides to stop working.Answer option C is incorrect. Involuntary exits is process that occurs due to mergers, outsourcing or changing business needs. It also occurs due to terminations for cause, such as performance problems, etc. Answer option A is incorrect. A lockout occurs when management shuts down operations to keep the union from working. Boycotts occur when the union and the employees work together against an employer to express their dissatisfaction with the employer's actions, or to try to force the employer into accepting their demands. Chapter: Employee and Labor Relations You are the HR Professional for your organization and you're reviewing the performance appraisal systems your company can use. Which performance appraisal approach uses a paired comparison method in the review? "