You are presented with the question "What prevents cold food from growing poisonous bacteria?" and the following answer choices: 
- Dehydration
 - Cooking
 - a hydraulic system
 - sweating
 - refrigerators
 - fur and fat
 - an electric stove
 - hard outer covering

Now knowing that arefrigerator is used for keeping food fresh for a long period of time and to prevent bacterial food poisoning, the basic rule is to keep hot foods hot and cold foods cold, choose the best answer.


 

     refrigerators    