Which detail from "Drawn to Barre" best supports the idea that stonecutters unions’ fought for workers’ rights?

By 1900, the Barre Granite Cutters' Union had over 1000 members and was the largest in the United States.
Many who came to Barre had an interest in politics. Some stonecutters wanted to start labor unions.
The rules for entry became stricter over the next 20 years. By then the people of Barre had already formed a union.
At the start of the 20th century, the union realized that breathing stone dust while working was extremely dangerous to workers, and tried to raise awareness about conditions.

The detail from "Drawn to Barre" that best supports the idea that stonecutters unions fought for workers’ rights is:

"At the start of the 20th century, the union realized that breathing stone dust while working was extremely dangerous to workers, and tried to raise awareness about conditions."

The detail from "Drawn to Barre" that best supports the idea that stonecutters unions fought for workers' rights is: "At the start of the 20th century, the union realized that breathing stone dust while working was extremely dangerous to workers, and tried to raise awareness about conditions." This detail demonstrates that the union was concerned about the health and safety of its members and took action to address the dangerous working conditions they faced.

The detail from "Drawn to Barre" that best supports the idea that stonecutters unions fought for workers' rights is the statement, "At the start of the 20th century, the union realized that breathing stone dust while working was extremely dangerous to workers, and tried to raise awareness about conditions." This detail shows that the union recognized the health hazard faced by the workers and took action to address it, indicating their commitment to fighting for workers' rights.