You are presented with the question " _ food can prevent spoilage" and the following answer choices: 
- chemical changes
 - Cooking
 - Enzymes
 - Dehydration
 - layers of fat
 - irradiating
 - disease
 - electricity

Now knowing that irradiating food can be used to kill existing microorganisms in the food and some microorganisms cause meat to spoil, choose the best answer.


 

      irradiating   