What is the primary role of the Occupational Safety and Health Administration (OSHA)?

The primary role of the Occupational Safety and Health Administration (OSHA) is to promote safe and healthy working conditions. This federal agency, part of the U.S. Department of Labor, is responsible for setting and enforcing workplace safety standards. OSHA's mission is to ensure that employers provide a workplace free from serious hazards and that employees have the right to a safe and healthful workplace. It achieves this through various mechanisms, including the development of regulations, conducting inspections, and providing training and education on health and safety issues.

In contrast, regulating financial practices, overseeing employee compensation issues, or establishing labor union regulations fall outside of OSHA's primary focus. These areas are typically managed by other entities such as the Securities and Exchange Commission (SEC) for financial practices, state labor departments for compensation, and the National Labor Relations Board (NLRB) for union regulations. Therefore, the emphasis on workplace safety and health encapsulates OSHA's main purpose, making it the correct answer.