Final answer:
Management is prohibited from seeking individuals to spy on coworkers, photographing employees, and visiting managers to gain their perception of popularity of unionization during the pre-election period.
Step-by-step explanation:
During the pre-election period, management is prohibited from:
- Seeking individuals to spy on coworkers who are possible union supporters.
- Photographing employees participating in information sessions about unionization.
- Visiting managers outside work to gain their perception of popularity of unionization.
These actions are prohibited as they violate the rights of employees and interfere with the collective bargaining process. It is important for management to respect employees' rights to organize and make decisions about unionization without interference or intimidation.