Answer:
The correct answer is: have workers sign authorization cards.
Explanation:
The right to organize and be part of a union is for most employees a fundamental labor right that is protected by state and federal "labor" law. The labor law that concerns your situation depends on the type of company or place in which you work (private or public company, small business, local or large corporation, etc.).
In order for the union to ask for the right to make an election, it must demonstrate that a significant number of employees could be interested in organizing. The next step is for union organizers to try to get workers to sign authorization cards. Before being able to request an election, 30% of the eligible employees in the corresponding negotiating unit must sign the aforementioned cards.
Federal and state laws prohibit employers from forcing, prohibiting or otherwise interfering with the collective protected activities of employees. Protected activities could include: