increasing the need to search for more oil. reducing the time it takes for oil to be renewed. decreasing the amount of oil that exists underground. extending the time that oil will be available for people to use.
I gave my students this multiple choice question: New engine technology has helped cars get more mileage per gallon of gas. Since gasoline comes from oil, this technology will affect the world supply of oil by

Only one answer is correct among these 4 choices:
- increasing the need to search for more oil.
- reducing the time it takes for oil to be renewed.
- decreasing the amount of oil that exists underground.
- extending the time that oil will be available for people to use.

Could you tell me which one is correct?

extending the time that oil will be available for people to use.