Please choose the correct solution to the question: To flatten a bottle cap to be cut to use as a key.

Solution1: Take a bottle cap and place it on an anvil or other sturdy surface. Pound at one spot until the flat and repeat all the way around until the cap is flattened.

Solution2: Take a bottle cap and place it on an styrofoam or other similar surface. Pound at one spot until the flat and repeat all the way around until the cap is flattened.

Answer format: solution1/solution2