Answer:
A. contamination of groundwater.
Step-by-step explanation:
Burying radioactive waste underground is a common method of disposal to contain and isolate these hazardous materials. However, one of the key concerns associated with this approach is the potential for the radioactive materials to leach into the groundwater, which can result in contamination and pose significant environmental and health risks. Specialized containment structures and engineered barriers are used to minimize this risk, but it remains a primary concern in the long-term management of radioactive waste.