Answer:
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.