Which of the following refined products is NOT made from crude oil? A. Heating oil B. Diesel and jet fuel C. Gasoline D. Biodiesel

The answer is letter d. Biodiesel. Biodiesel is made of natural products made from animal fats and vegetable oils meant to be used in typical diesel engines and is thus different from the vegetable and waste oils used to fuel converted diesel engines. While the crude oil is a naturally occurring flammable liquid containing complex mixtures of hydrocarbons and other organic compounds.