It keeps kitchens cooler in the summer. It provides more space for food storage. It makes food safer to eat for longer periods. It makes electricity safer to use in the kitchen.
I gave my students this multiple choice question: Many bacteria grow quickly at room temperatures of about 20°C. The temperature inside a refrigerator is usually kept at about 4°C. Which statement best explains how using a refrigerator has helped society?

Only one answer is correct among these 4 choices:
- It keeps kitchens cooler in the summer.
- It provides more space for food storage.
- It makes food safer to eat for longer periods.
- It makes electricity safer to use in the kitchen.

Could you tell me which one is correct?

It makes food safer to eat for longer periods.