The rise of the Knights of Labor led to support for a national populist political party in the late 1800s.
The Knights of Labor was the first major labor organization in the United States that is composed on both unskilled and skilled workers that campaigned for an eight hour workday and also aspired to form a cooperative society in which laborers owned the industries in which they worked.
As these union who to educate the situation of labor, the rise of the Knights of Labor also led to support for a national populist political party in the late 1800s.
Therefore, the Option B is correct.
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