By the late 1800s the relationship between factory/business owners and workers had changed in that options—- A
They got along even better
B
Workers were paid little and conditions were bad
С
Workers were paid even better and had great working conditions comparered to before
D
Nothing changed

B. Workers were paid little and conditions were bad

Explanation:

The federal government still hasn't develop a proper worker's protection law in late 1800s. United States didn't introduced legislation to control minimum wage until 1938. Even after the minimum wage legislations were passed, the payment for workers still considered to be really low. (Around $4.24/hour if we convert it to today's valuation)

The working conditions for the workers were horrible until the creation of The Occupational Safety and Health Administration  in 1971.

answer; the merit selection, also known as the missouri plan;