Which of the following government regulatory agencies helps monitor and regulate workplace and product safety?

The correct answer is C. OSHA.

OSHA stands for the Occupational Safety and Health Administration, which is a government agency focused on ensuring safe and healthy working conditions by setting and enforcing standards for workplace safety and health. The other agencies mentioned (NIH, NIST, and ANA) have different roles related to health research, standards for measurement, and nursing practice, respectively. If you have any more questions or need further clarification, feel free to ask!