What defines a craft union?

A craft union is characterized by its focus on a specific skill or trade, composed of workers who share a common set of skills or expertise within a particular craft. This type of union is formed to advocate for the interests of its members, who typically have specialized training or certification in a specific area of work, such as electricians, carpenters, or machinists.

By concentrating on workers of a shared craft, these unions can negotiate more effectively for wages, working conditions, and benefits that are tailored to their particular skills and professional challenges. This specificity is why the correct answer highlights a labor organization that includes workers of a common skill, emphasizing the collective nature of their expertise and the unified voice they present in labor negotiations.

In contrast, the other choices illustrate different concepts that do not align with the definition of a craft union. Unions representing all employees in a corporation or only managers do not focus on a specific trade, while a governmental labor organization refers to structures and policies related to labor relations set by government entities rather than a union dedicated to a specific skilled workforce.