You are presented with the question "Which product is widely used today to make fuel for cars?" and the following answer choices: 
- swamp gas
 - corn
 - comets
 - meteorites
 - fat
 - energy
 - oil
 - Carbon

Now knowing that ethanol is produced by alcoholic fermentation of the glucose in corn or other plants and methanol and Ethanol are two types of alcohol fuels used in cars, choose the best answer.


 

  corn       