You are presented with the question "what can keep food from going bad?" and the following answer choices: 
- irradiation
 - Cooking
 - Dehydration
 - sensory neurons
 - animal transport
 - Enzymes
 - nutrients
 - layers of fat

Now knowing that microorganisms cause food to spoil and irradiation kills microorganisms that spoil food, choose the best answer.


 

 irradiation        