You are presented with the question "What appliance can keep food good a long time?" and the following answer choices: 
- toaster
 - Fuel cells
 - Cooking
 - a hydraulic system
 - an electric stove
 - oven
 - refrigerator
 - vacuum cleaner

Now knowing that arefrigerator is used for keeping food fresh for a long period of time and fresh food is good, choose the best answer.


 

       refrigerator  