rain fog groundwater surface water
I gave my students this multiple choice question: Radioactive waste from nuclear power plants is sealed in containers and deeply buried in the ground. Sealing and burying waste reduces the chances that water will become contaminated. At which point in the water cycle would radioactive contamination most likely be found?

Only one answer is correct among these 4 choices:
- rain
- fog
- groundwater
- surface water

Could you tell me which one is correct?

groundwater