Please choose the correct solution to the question: To create a makeshift ice pack,

Solution1: 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.

Solution2: 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 format: solution1/solution2