Final answer:
The correct answer is D. all of the above, indicating that unauthorized use of radioactive materials, falsified records, or increased incidents can signal several issues in practices, auditing, and training related to the handling of radioactive substances.
Step-by-step explanation:
The unauthorized use of radioactive materials, falsified survey records, or increases in incidents may be indicative of poor practices, the need for an audit, and inadequate or poor training. Therefore, the correct answer is D. all of the above. These indicators suggest systemic problems that could have serious implications for both safety and compliance in environments where radioactive materials are handled.
In any context where radioactivity is a factor, strict protocols are necessary to protect workers and the public. Measuring and monitoring exposure levels through devices like personal dosimeters and more sensitive crystal-based systems are critical to maintaining safety standards. Furthermore, the examples provided illustrate how issues like the release of radiation, the necessity for patient confinement, and the potential for radioactive contamination in construction materials show the complexity and risks involved in working with such materials.
Incidents such as the Love Canal Disaster also underscore the importance of proper oversight and regulation to prevent contamination and exposure to hazardous materials.