In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)
(1 point)
• a car that traveled 50 kilometers on 4.0 liters of gas
• a car that traveled 70 kilometers on 5.0 liters of gas
• a car that traveled 80 kilometers on 5.0 liters of gas
• a car that traveled 90 kilometers on 6.0 liters of gas