New dispensers must have UDC. Which option best completes this statement?

• A. UDC
• B. UL
• C. ADA
• D. GPS

Answer: (A)

The key idea is Under-Dispenser Containment. This is the feature that new dispensers are required to have to catch and hold any fuel drips or spills that occur during dispensing. Recognizing UDC as the containment component explains why it best completes the statement: it names the specific requirement for new equipment, focusing on environmental protection and spill control.

Why this fits better than the other options is that those alternatives refer to different, unrelated concepts (safety certification, accessibility, or positioning), none of which describe a spill-containment requirement for dispensers. The containment feature directly addresses preventing leaks from reaching soil or groundwater and helps with regulatory compliance and cleanup.

In practice, UDC is implemented as a tray or sump beneath the dispenser that collects spills, drips, and overflows, often connected to proper drainage or a contained tank. This keeps the fueling area safer and cleaner and reduces environmental risk.