You are presented with the question "What can extend the shelf life of food?" and the following answer choices: 
- cooking it
 - Enzymes
 - evaporation
 - rays or beams
 - running it under water
 - Proteins
 - seasoning it
 - putting it on a counter

Now knowing that killing microorganisms in food can be used to extend the shelf life of that food and cooking kills the microorganisms, choose the best answer.


 

 cooking it        