You are presented with the question "what can be used to extend the shelf life of food" and the following answer choices: 
- Cooking
 - Enzymes
 - rays or beams
 - irradiation
 - leaving food at room temperature
 - Dehydration
 - eating food
 - grinding food

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


 

    irradiation     