Occupational Safety and Health Administration (OSHA) is responsible for:

The Occupational Safety and Health Administration (OSHA) is a vital federal agency established to ensure safe and healthy working conditions across the United States.

• The correct answer, B: Ensuring safe working conditions, precisely describes OSHA's primary mission. OSHA sets and enforces standards, provides training, outreach, education, and assistance to prevent work-related injuries, illnesses, and fatalities.
• A: Setting minimum wage is the responsibility of the U.S. Department of Labor's Wage and Hour Division, not OSHA.
• C: Regulating union elections falls under the jurisdiction of the National Labor Relations Board (NLRB).
• D: Approving training programs is too broad; while OSHA may approve specific safety training programs, it is not its general mandate to approve all types of training across industries.