Tommy has been asked to write a 1-page essay about recycling. He decides to write about biodiesel, which is a fuel that is made from recycled oil. Which of the following would make a solid thesis for Tommy's essay?
A Recycling old cooking oil for use in diesel engines helps the environment by reducing carbon emissions and limiting our need for fossil fuels.
B Electric cars are really better than biodiesel engines because electric engines do not burn fuel at all, so there is less global warming.
C Biodiesel is great for the economy because it is basically free, for all you have to do is put old vegetable oil in your car.
D Biodiesel is created from corn products, but it can also come from old cooking oil or left-over animal fat from the meat packing industry.