What is a union shop?

A union shop refers to an arrangement in which new employees are required to join the union within a specified timeframe after being hired. This means that if an individual is employed at a company that has a union shop agreement, they must become a member of the union as a condition of their employment. This arrangement is designed to ensure that all employees contribute to the costs associated with union representation, as unions negotiate on behalf of all employees, regardless of membership status.

In this context, the significance of a union shop lies in its role in strengthening the union's ability to advocate for workers' rights and conditions, as it ensures a broader base of support among the workforce. Furthermore, this type of agreement encourages solidarity among employees in the workplace, fostering a united front during negotiations with management.

The other options do not accurately capture the specific characteristics of a union shop, as they refer to other aspects of union dynamics or membership that do not necessarily involve the mandated joining of a union as a condition of employment.