Final answer:
A worker who believes work is still unsafe after a supervisor's report can file a complaint with D)Workplace health and safety through OSHA. OSHA allows confidential complaints and protects workers from employer retaliation as per the OHSA.
Step-by-step explanation:
After receiving a supervisor's report about unsafe work, a worker who still believes the work is unsafe can file a complaint with Workplace health and safety, specifically with the Occupational Safety and Health Administration (OSHA). OSHA allows current workers, or their representatives, to file confidential complaints and request inspections if they believe there is a serious hazard or if their employer is not following OSHA's safety standards. Workers are protected from retaliation by employers for exercising these rights under the Occupational Health and Safety Act (OHSA). This legislation is crucial for enforcing workplace safety and ensuring that working conditions do not pose a risk of serious harm to employees.