A economic and environmental benefits of natural gas vehicles are both immediate results of smaller footprints than those of gasoline or diesel automobiles.
B economic benefits of natural gas vehicles are not as considerable as the environmental benefits because of the cost of the natural gas production process.
C natural gas vehicles produce smaller footprints than those of gasoline or diesel automobiles because they bring more environmental benefits.
D environmental benefits of natural gas vehicles are remarkable despite the carbon-rich methane released into the atmosphere in the production process.
E environmental benefits of natural gas vehicles are not as considerable as the economic benefits because of the cost of the carbon-rich methane released into the atmosphere in the production process.