Please choose the correct solution to the question: How can you vacuum seal a bag at home?

Solution1: Place the food inside a zipper-locked bag, seal it except the last inch.  Lower the bag into a vat of water, just before the zipper goes underwater, seal it off.

Solution2: Place the food inside a zipper-locked bag, seal it except the last inch.  Lower the bag into a vat of oil, just before the zipper goes underwater, seal it off.

Answer format: solution1/solution2
Answer: solution1