Which car has the greatest efficiency?

Question

A.) a 1,200 kg car that travels 20 km per liter of fuel

B.) a 900 kg car that travels 20 km per liter of fuel

C.) a 1,200 kg car that travels 15 km per liter of fuel

D.) a 900 kg car that travels 15 km per liter of fuel

Answer 1

B) a 900 kg car that travels 20 km per liter of fuel