B. union demands to reform conditions in industry.
The Adamson Act of 1916 was passed as a response to the demands of labor unions, particularly the railroad unions, which were threatening to strike for an eight-hour workday. The act established the eight-hour workday as the standard for railroad workers and provided for overtime pay for additional hours worked. Thus, the Act was aimed at improving the conditions of workers in the railroad industry and responding to the demands of labor unions, rather than addressing political corruption, environmental concerns, or corporate monopolies and trusts.