Question: To create a makeshift ice pack,

  Options: 
 A. take a sponge and soak it in oil. Put the sponge in a refrigerator and let it freeze. Once frozen, take it out and put it in a ziploc bag. You can now use it as an ice pack.
 B. take a sponge and soak it in water. Put the sponge in a refrigerator and let it freeze. Once frozen, take it out and put it in a ziploc bag. You can now use it as an ice pack.
Answer: B