You are presented with the question "What is produced by alcoholic fermentation of the glucose in corn or other plants?" and the following answer choices: 
- Chemical energy
 - it helps plants in growing
 - the corniest beverage
 - Organic compounds
 - the least used fuel source
 - the least used biofuel
 - the most widely used biofuel
 - A compound that donates proton

Now knowing that ethanol is produced by alcoholic fermentation of the glucose in corn or other plants and ethanol is the most widely used biofuel today, choose the best answer.


 

       the most widely used biofuel  