produce more horsepower. eliminate greenhouse gas emissions. operate independently of fossil fuels. provide better gas mileage.
I gave my students this multiple choice question: Compared to similar-sized gasoline-powered vehicles, electric-gasoline-hybrid vehicles are primarily designed to

Only one answer is correct among these 4 choices:
- produce more horsepower.
- eliminate greenhouse gas emissions.
- operate independently of fossil fuels.
- provide better gas mileage.

Could you tell me which one is correct?

provide better gas mileage.