Fact 1: Arefrigerator is used for keeping food fresh for a long period of time. Fact 2: Kitchen appliances include refrigerator. Given the two facts above, answer the question "What is used for keeping food fresh for a long period of time?" with the following options: - Gardens - an electric stove - A kitchen appliance - Fuel cells - Plates - Air freshener - Electric generators - electricity
A:
A kitchen appliance