Question

why would a doctor most likely restrict a patients contact with other people while the patient receives internal radiation?
the patients stress and anxiety would be eliminated.
high levels of radiation can diffuse through the patients skin.
social contact would increase the effect of the radiation treatment.
radioactive material can leave the patients body through saliva, sweat, and urine

Explanation:

When a patient receives internal radiation, radioactive material can be excreted through bodily fluids like saliva, sweat, and urine. Limiting contact reduces the risk of exposing others to radiation. Stress - anxiety elimination isn't the main reason. Radiation doesn't diffuse through skin in a significant way to cause this restriction, and social contact doesn't increase radiation treatment effect.

Answer:

Radioactive material can leave the patient's body through saliva, sweat, and urine