Which of the following was a labor union open to workers from any trade
a. knight of labor
b. american federation of labor
c. international workers of the world

The correct answer is A) Knights of Labor

The labor union that was open to workers from any trade was the Knights of Labor.

The Knights of Labor was the labor Union that was opened to workers from any trade. In opposition to the American Federation of Labor that only accepted limited membership to very good craftspeople and it focused on economic reforms, the Knights of Labor -the first one formed- was open to receive any kind of worker. It had its peak moments in 1880 with the work of labor leaders such as Joseph Bath and Terence V. Powderly.

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