Answer:
B. slowly, after over 100 years of small steps, backslides, and back-and-forth between business interests and representatives for workers
Step-by-step explanation:
Before 1970, America was experiencing a sharp increase in the number of occupational injuries and illnesses. Both the injuries and illnesses were becoming more severe, which lead to increased death and disabilities due to work-related issues.
The OSHA act was passed in 1970. Prior to that, the responsibilities for developing workplace safety and health regulations were under the ministry of labor. Activities and lawmakers felt that the existing structure give not give enough weight to workers plight. Employees were left at the mercy of their employers.
After intensive lobbying in the senate, the OSHA act was signed into law in 1970 by president Richard M. Nixon. The law aimed to promote safety and ensure safer working conditions for all workers, notwithstanding their job or industry.