Fact 1: Killing microorganisms in food can be used to extend the shelf life of that food.

Fact 2: Cooking kills the microorganisms.

Given the two facts above, answer the question "What can extend the shelf life of food?" with the following options: 
- cooking it
 - Enzymes
 - evaporation
 - rays or beams
 - running it under water
 - Proteins
 - seasoning it
 - putting it on a counter


 

 cooking it        