Which group of individuals is specifically targeted for thyroid monitoring?

The correct choice highlights the importance of thyroid monitoring for individuals handling more than a specified amount of radioiodine, which is 1.0 mCi. This is significant because radioiodine is known to accumulate in the thyroid gland, leading to the potential for radiation exposure and increased risk of thyroid-related health issues. The thyroid is particularly sensitive to radioactive iodine isotopes, and monitoring ensures that those working with these substances are kept within safe exposure limits to protect their health.

This targeted approach allows health and safety personnel to implement measures such as regular dose assessments and potential medical interventions if excessive exposure is detected. Other groups, while they may also experience some risks associated with radiation exposure, do not require the same level of focused thyroid monitoring as those directly handling radioiodine, making this choice particularly relevant for radiation safety protocols.