Which of the following factors can define the risk of INTERNAL exposure?

The risk of internal exposure to radioactive materials is influenced by a combination of factors, which is why selecting the option that includes all of them is the best choice.

First, the duration of exposure is significant because the longer a person is exposed to radioactive materials, the more likely they are to absorb a harmful dose. Extended exposure increases the likelihood that the radioactive particles will accumulate in the body, potentially leading to greater health risks over time.

Second, the type of radioactive material plays a crucial role as different isotopes have varying levels of toxicity, decay rates, and biological effects. For instance, some radioactive materials emit alpha particles while others may emit beta or gamma radiation, each of which interacts differently with human tissue and can therefore pose differing levels of risk.

Third, the method of entry into the body is also a critical factor. Radioactive materials can enter the body through inhalation, ingestion, or absorption through the skin. Each route of entry carries different risks; for example, inhalation may lead to particles becoming lodged in the lung tissue, whereas ingestion might mean the material gets absorbed into the bloodstream, leading to systemic effects.

Considering all these factors collectively provides a comprehensive understanding of the risk associated with internal exposure to radioactive materials, thereby making the choice that