Which of the following abbreviations refers to a driver's license?

The abbreviation that refers to a driver's license is CDL, which stands for Commercial Driver's License. This specific license is required for individuals who operate commercial vehicles such as buses, trucks, and other larger vehicles that meet certain weight and transport criteria. Understanding the distinction of a CDL is crucial for anyone involved in commercial vehicle inspection or operation since it signifies that the driver has met specific training and testing requirements meant to ensure safety on the road.

DDL may refer to a different concept altogether, potentially representing something like Digital Driver License or similar; it's not widely recognized as a standard abbreviation for a driver's license. DMV stands for Department of Motor Vehicles, which is the government agency that issues driver's licenses and maintains vehicle registration but does not denote the license itself. ELECT does not hold a commonly accepted meaning related to driver's licenses within the context of vehicle operation or legislation. Therefore, CDL is the correct choice when identifying the abbreviation for a driver's license specifically pertaining to commercial driving.