Final answer:
Underground storage tanks must be registered with the Minnesota Pollution Control Agency, ensuring adherence to safety and environmental standards. The correct option is B) Underground storage tanks.
Step-by-step explanation:
The tanks that must be registered with the Minnesota Pollution Control Agency are Underground storage tanks (USTs). The federal and state regulations require that USTs, which typically contain petroleum or hazardous substances, be registered to ensure they meet safety and environmental protection standards.
Registration helps in monitoring and preventative maintenance, reducing the likelihood of leaks that could contaminate soil and groundwater.
On the other hand, aboveground storage tanks, residential heating oil tanks, and portable storage tanks have different regulations and requirements, often less stringent, and may not require registration with the Minnesota Pollution Control Agency.
Aboveground storage tanks (A), underground storage tanks (B), and portable storage tanks (D) must be registered with the Minnesota Pollution Control Agency. Residential heating oil tanks (C) do not need to be registered.
The correct option is B) Underground storage tanks.