I believe it's copper and gold :)
Because they can build something for everyone not just help poor lazy people this benifits everyone in stead of a single group of people
Answer:
The KOL admitted women and African Americans.
Explanation:
The Knights of Labor were characterized by being a more radical group, they tended to be more extreme within its time period as well as who were included as members. From the year 1878 on. the Knights of Labor started to let in their group women and black people.