You are presented with the question "Bacteria can be killed to extend the shelf life of what?" and the following answer choices: 
- milk
 - rocks
 - coffee
 - edible
 - food
 - phytoplankton
 - influenza
 - tuna

Now knowing that killing microorganisms in food can be used to extend the shelf life of that food and bacteria are microorganisms that exist everywhere, choose the best answer.


 

     food    