Which term describes autonomous vehicles that operate without passengers and may contribute to pollution if not powered by clean energy?

• A. Driverless taxis
• B. Zombie cars
• C. Autonomous cargo vehicles
• D. Smart cars

Answer: (B)

The idea being tested is recognizing a term for autonomous vehicles that move without people aboard and may worsen pollution if they run on non-clean energy. The phrase “zombie cars” fits this scenario because it evokes vehicles that roam without a human driver or passenger, underscoring both the lack of riders and the potential environmental impact when their energy isn’t clean.

Driverless taxis imply carrying passengers, so they don’t match the no-passengers aspect. Autonomous cargo vehicles are about goods transport rather than passengerless roaming, which is a different emphasis. Smart cars is a broad label for intelligent vehicles and doesn’t specifically highlight the absence of passengers or pollution risk.