Which of the following is a common reason for an unfair labor practice claim?

Denying workers their right to unionize is a key factor in unfair labor practice claims because it directly infringes upon workers' rights to organize, which is protected under Canadian labor law. The ability to form and join trade unions is enshrined in various labor statutes and is fundamental to the collective bargaining process. When an employer obstructs or retaliates against employees who seek to unionize, it undermines the protections designed to create fair and equitable workplace conditions.

Promotion practices, benefits distribution, and overtime offerings themselves do not typically raise unfair labor practice concerns unless they are tied to union activities or retaliatory actions against employees engaging in their rights as workers. In this context, denying the right to unionize stands out as a clear violation of labor rights, making it a common basis for an unfair labor practice claim.