Final answer:
The amount of exposure to radiation is not affected by the size or weight of the radioactive source, distance from the source, or degree of radioactivity. However, the total time of exposure does affect the amount of radiation received.
Step-by-step explanation:
The amount of exposure to radiation that a person receives is not affected by the size or weight of the radioactive source, the distance from the source, or the degree of radioactivity of the material.
The total time of exposure does affect the amount of radiation a person receives. The longer the exposure, the higher the amount of radiation.
Therefore, the correct answer is none of the choices.