Which legislation mandates employers to maintain a workplace free from recognized hazards?

The correct answer is C because the Occupational Safety and Health Administration (OSHA) is the regulatory body that enforces workplace safety and health standards in the United States. The main purpose of OSHA is to ensure that employers provide a working environment that is free from recognized hazards that could potentially harm employees. This includes a wide range of safety measures and regulations designed to protect workers from various occupational risks, such as exposure to toxic chemicals, unsafe machinery, and other dangers that could lead to injury or illness.

OSHA's role is crucial in enforcing standards and providing training and education to both employers and employees about their rights and responsibilities regarding workplace safety. This legislative framework allows workers to file complaints and report unsafe work conditions, further encouraging a culture of safety within workplaces across different industries.

In contrast, other options like HIPAA focus on patient privacy rights, FMLA addresses family and medical leave, and ADA governs anti-discrimination against individuals with disabilities. While each of these laws plays an essential role in the context of healthcare and employee rights, they do not specifically mandate the maintenance of a hazard-free work environment in the same way that OSHA does.