Correct Response: A. The Agency for Healthcare Research and Quality is part of the U.S. Department of Health and Human Services. Among other things, this agency provides information about different health care plans and prevention and wellness programs. The Occupational Safety and Health Administration (B) is part of the U.S. Department of Labor and helps ensure health and safety in the workplace. The World Health Organization (C) is part of the United Nations, and its primary concern is public health on an international level. The Centers for Disease Control and Prevention (D) is part of the U.S. Department of Health and Human Services and is in charge of tracking and investigating public health trends.