You are presented with the quiz "What can run on alcoholic fermentation of the glucose in corn or other plants?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "ethanol is produced by alcoholic fermentation of the glucose in corn or other plants" and "cars can run on pure ethanol or a mixture of petrol and ethanol". 

So, what's the best answer to the question?


 

     cars      