You are presented with the question "Fires cannot burn where?" and the following answer choices: 
- dormant state
 - one celled organisms
 - in the atmosphere
 - in a pit
 - in the woods
 - In the winter
 - the Great Barrier Reef
 - vacuum of space

Now knowing that afire requires oxygen to burn and in the vacuum of space, there's no oxygen to burn, choose the best answer.


 

        vacuum of space 