Final answer:
a. NSF, UL
The agencies responsible for certifying equipment safety are the National Sanitation Foundation (NSF) and Underwriters Laboratories (UL), while the Environmental Protection Agency (EPA) is in charge of water quality standards.
Step-by-step explanation:
The National Sanitation Foundation (NSF) and Underwriters Laboratories (UL) are organizations that certify the safe construction of equipment, ensuring it meets certain public health and safety standards.
The correct answer to the question, "What are the National Sanitation Foundation and Underwriters Laboratories, agencies who certify the safe construction of equipment?" is a. NSF, UL.
The United States government agency that is responsible for water quality standards is the Environmental Protection Agency (EPA). Other government agencies that provide for public well-being include the Occupational Safety and Health Administration (OSHA), responsible for worker safety, and the Food and Drug Administration (FDA), responsible for food safety, amongst others.